Quantum Optics Group

Targets:

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Experimental data from the squeezed vacuum states, its reconstructed Wigner wave function, and the corresponding density matrix.

• As classical counterparts utilizing both digit and analog information processing, quantum qubits in continuous variables (CV) provide a complementary family to the fragile discrete variables only with single photons and photon pairs.
• Continuous variables (CV) states, including coherent and squeezed states, are intrinsically multi-particle quantum superpositions and may be used to probe the quantum-to-classical transition, as well as the generation of Einstein-Podolsky-Rosen states.
• To have a fully understanding about quantum wave function, we have implemented the quantum state tomography, including the Wigner function and density matrix for quantum wave-packets.

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Achievements:
   

• In order to leverage the full power of quantum noise squeezing with unavoidable decoherence, a complete understanding of the degradation in the purity of squeezed light is demanded. By implementing machine learning architecture with a convolutional neural network, we illustrate a fast, robust, and precise quantum state tomography for continuous variables, through the experimentally measured data generated from the balanced homodyne detectors. [2].
• We report our implementation of a squeezer, by generating squeezed vacuum state at 1064 nm through a bow-tie optical parametric oscillator cavity operated below the threshold. With the help of our home-made balanced homodyne detector (BHD), characterized with a Common Mode Rejection Ratio (CMRR) more than 80dB. Detection of 10 dB vacuum noise squeezing at 1064 nm [1].

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[3] Yi-Ru Chen, Hsien-Yi Hsieh, Jingyu Ning, Hsun-Chung Wu, Hua Li Chen, You-Lin Chuang, Popo Yang, Ole Steuernagel, Chien-Ming Wu, and RKL, "Experimental reconstruction of Wigner phase-space current," Phys. Rev. A 108, 023729 (2023); [download].

[2] Hsien-Yi Hsieh, Yi-Ru Chen, Hsun-Chung Wu, Hua Li Chen, Jingyu Ning, Yao-Chin Huang, Chien-Ming Wu, and RKL, "Extract the Degradation Information in Squeezed States with Machine Learning," Phys. Rev. Lett. 128, 073604 (2022); [download]. The first experimental paper from my own group.

[1] Chien-Ming Wu, Shu-Rong Wu, Yi-Ru Chen, Hsun-Chung Wu, and RKL, Conference on Lasers and Electro-Optics (CLEO), paper JTu2A.38 (2019) [ Download].

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Next:

 

Targets:

The astrophysical reach of current and future ground-based gravitational-wave detectors is mostly limited by quantum noise, induced by vacuum fluctuations entering the detector output port. The replacement of this ordinary vacuum field with a squeezed vacuum field has proven to be an effective strategy to mitigate such quantum noise and it is currently used in advanced detectors [2].

However, current squeezing cannot improve the noise across the whole spectrum because of the Heisenberg uncertainty principle: when shot noise at high frequencies is reduced, radiation pressure at low frequencies is increased. A broadband quantum noise reduction is possible by using a more complex squeezing source, obtained by reflecting the squeezed vacuum off a Fabry-Perot cavity, known as filter cavity.

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Achievements:

• First demonstration of a frequency-dependent squeezed vacuum source able to reduce quantum noise of advanced gravitational-wave detectors in their whole observation bandwidth. The experiment uses a suspended 300-m-long filter cavity, similar to the one planned for KAGRA, Advanced Virgo, and Advanced LIGO, and capable of inducing a rotation of the squeezing ellipse below 100 Hz [1].

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[1] Yuhang Zhao, Naoki Aritomi, Eleonora Capocasa, Matteo Leonardi, Marc Eisenmann, Yuefan Guo, Eleonora Polini, Akihiro Tomura, Koji Arai, Yoichi Aso, Yao-Chin Huang , RKL, Harald Luck, Osamu Miyakawa, Pierre Prat, Ayaka Shoda, Matteo Tacca, Ryutaro Takahashi, Henning Vahlbruch, Marco Vardaro, Chien-Ming Wu, Matteo Barsuglia, and Raffaele Flaminio, "Frequency-dependent squeezed vacuum source for broadband quantum noise reduction in advanced gravitational-wave detectors," Phys. Rev. Lett. 124, 171101 (2020) [download];   Editors' Suggestion; Featured in Physics [download].

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Next:


The plan is to have filter cavities like these installed for the next round of observing that should start in 2022. Eventually, this and other improvements are expected to give an eightfold increase in detection rate, for both black hole and neutron star mergers, which are observable, respectively, at low and high frequencies.
Squeezing into the Tunnel !!

Targets:

• Based on the niche of silicon photonics technologies and semiconductor industries in Taiwan, we plan to integrate these enabling technologies, based our expertise on photonic qubits (single photon source, entangled photon pair, squeezed light), integrated optical components based on silicon photonics, and photon detector arrays (single photon avalanche diode, homodyne detector), for the realization of "Scalable Quantum Photonic Chips on Silicon".
• The target is to incorporate our current fabrication technologies into a large-scale quantum system, and to realize multiplexing silicon photonic quantum chips with the ability to perform fault-tolerant quantum computation at room temperature.

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Achievements:

CNOT-gate on the silicon photonics, collaborated with Prof. Mark Ming-Chang Lee (NTHU)

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Next:

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Achievements:

• Exploiting the correspondence between the Wigner distribution function and the frequency-resolved optical gating (FROG) measurement, we experimentally demonstrate the existence of chessboard-like interference patterns with a time-bandwidth product smaller than that of a transform-limited pulse in the phase-space representation of compass states. Using superpositions of four electric pulses as the realization of compass states, we have shown via direct measurements that displacements leading to orthogonal states can be smaller than limits set by uncertainty relations. In the experiment we observe an exactly chronocyclic correspondence to the sub-Planck structure in the interference pattern appearing for the superposition of two Schrodinger-cat-like states in a position-momentum phase space [1].
• We present a phase-space study of a non-Hermitian Hamiltonian with PT symmetry based on the Wigner distribution function. For an arbitrary complex potential, we derive a generalized continuity equation for the Wigner function flow and calculate the related circulation values. Studying the vicinity of an exceptional point, we show that a PT-symmetric phase transition from an unbroken PT -symmetry phase to a broken one is a second-order phase transition [2].
• We derive a continuity equation for the evolution of the SU(2) Wigner function under nonlinear Kerr evolution. We give explicit expressions for the resulting quantum Wigner current, and discuss the appearance of the classical limit. We show that the global structure of the quantum current significantly differs from the classical one, which is clearly reflected in the form of the corresponding stagnation lines [3].

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[5] Yi-Ru Chen, Hsien-Yi Hsieh, Jingyu Ning, Hsun-Chung Wu, Hua Li Chen, You-Lin Chuang, Popo Yang, Ole Steuernagel, Chien-Ming Wu, and RKL, "Experimental reconstruction of Wigner phase-space current," Phys. Rev. A 108, 023729 (2023); [download].

[4] Ole Steuernagel, Popo Yang, and RKL, "On the Formation of Lines in Quantum Phase Space," J. Phys. A 56, 015306 (2023); [download].

[3] Popo Yang, Ivan F. Valtierra, Andrei B. Klimov, Shin-Tza Wu, RKL, and Luis L. Sanchez-Soto, and Gerd Leuchs, "The Wigner flow on the sphere," Physica Scripta 94, 044001 (2019); for the New Focus issue: Quantum Optics and Beyond- in honour of Wolfgang Schleich [download].

[2] Ludmila Praxmeyer, Popo Yang, and RKL, "Phase-space representation of a non-Hermitian system with PT-symmetry," Phys. Rev. A 93, 042122 (2016) [download].

[1] Ludmila Praxmeyer, Chih-Cheng Chen, Popo Yang, Shang-Da Yang, and RKL, "Direct measurement of time-frequency analogs of sub-Planck structures," Phys. Rev. A 93, 053835 (2016) [download].

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Next:

Targets:

Instead of conventional quantum mechanics with Hermitian Hamiltonians, non-Hermitian parity-time (PT)-symmetry was initially introduced to generalize quantum mechanics, with the introduction of the parity operator P and time-reversal operator T. Non-Hermitian Hamiltonians are useful in theoretical work, and they are a mathematical tool for studying open quantum systems in nuclear physics or quantum optics.

Quantum thermodynamics and quantum nonlocality share similar capacity to tell quantum and classical regimes apart. For quantum nonlocality, we have the famous Einstein-Podolsky-Rosen (EPR) paradox and Bell’s inequality to illustrate the bizarre nature of quantum theory. On the other hand, for quantum thermodynamics, a multitude of intriguing phenomena related to various definitions of work have been addressed.

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Achievements:

• We rule out PT-symmetry as a fundamental theory, but it still could be useful as an effective theory and an interesting model for open systems in classical optics [1].
• Due to noisy environment, quantum signals are in general fragile and hard to be detected. Through weak measurement to enlarge the quantum signal, we disclose the way to simulate pseudo-Hermitian system quantum theory [6].
• For the quantification of steerability, we prove that a strengthened version of the steering fraction is a convex steering monotone and demonstrate how it is related to two other steering monotones, namely, steerable weight and steering robustness [3].
• For a bipartite state with equal local dimension d, we prove that one can obtain work gain under Landauer’s erasure process on one party in the identically and independently distributed limit when the corresponding fully entangled fraction is larger than d. As a step to link quantum thermodynamics and quantum nonlocality, we also provide a simple picture to approximate the optimal work extraction and suggest a potential thermodynamic interpretation of the fully entangled fraction for isotropic states [4].

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[12] Minyi Huang, RKL, Qing-hai Wang, Guo-Qiang Zhang, and Junde Wu, "Solvable dilation model of time-dependent PT-symmetric systems," Phys. Rev. A 105, 062205 (2022); [download].

[11] Minyi Huang and RKL, "Internal nonlocality in generally dilated Hermiticity," Phys. Rev. A 105, 052210 (2022); [download].

[10] Hai Wang, RKL, and Junde Wu, "Discrete-time modeling of quantum evolutions, the energy-time uncertainty relation and general extensions in the entangled history formalism," [arXiv: 1908.02935].

[9] Hai Wang, RKL, Manish Kumar Shukla, Indranil Chakrabarty, Shaoming Fei, and Junde Wu, "What are temporal correlations?," [arXiv: 1910.05694].

[8] Minyi Huang, RKL, and Junde Wu, "Extracting the internal nonlocality from the dilated Hermiticity," Phys. Rev. A 104, 012202 (2021); [download].

[7] Li-Yi Hsu, Ching-Yi Lai, You-Chia Chang, Chien-Ming Wu, and RKL, "Carrying an arbitrarily large amount of information using a single quantum particle," Phys. Rev. A 102, 022620 (2020); [download].

[6] Minyi Huang, RKL, Lijian Zhang, Shao-Ming Fei, and Junde Wu, "Simulating broken PT-symmetric Hamiltonian systems by weak measurement," Phys. Rev. Lett. 123, 080404 (2019) [download].

[5] Minyi Huang, RKL, and Junde Wu, "Manifestation of Superposition and Coherence in PT-symmetry through the $\eta$-inner Product," J. Phys. A: Math. Theor. 51, 414004 (2018) [download].

[4] Chung-Yun Hsieh and RKL, "Work extraction and fully entangled fraction," Phys. Rev. A 96, 012107 (2017) [download]; Phys. Rev. A 97, 059904(E) (2018) [Erratum].

[3] Chung-Yun Hsieh, Yeong-Cherng Liang, and RKL, "Quantum steerability: Characterization, quantification, superactivation, and unbounded amplification," Phys. Rev. A 94, 062120 (2016) [download].

[2] Ludmila Praxmeyer, Popo Yang, and RKL, "Phase-space representation of a non-Hermitian system with PT-symmetry," Phys. Rev. A 93, 042122 (2016) [download].

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[1] Yi-Chan Lee, Min-Hsiu Hsieh, Steven T. Flemmia, and RKL, "Local PT symmetry violates the no-signaling principle," Phys. Rev. Lett. 112, 130404 (2014) [download]; Editors' Suggestion; Featured in Physics: Reflecting on an Alternative Quantum Theory.  [link]

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Next:

AI-generated image of a quantum robotic Schrödinger's cat that reads a quantum machine learning review paper.

Targets:

Quantum effects are known to provide a speedup in particle transport in specific networks under some requirements on the system coherence. The exact requirements are, however, not only determined by the quantum experimental system, but also by the network itself. In particular, Quantum Walks is a tool for studying various phenomena in quantum systems, including quantum transport in complex networks for the developments in quantum computing, search algorithms, communication networks, and efficient energy transport.

Understanding these advantages of quantum transport over classical transport would be beneficial for many fields.

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The cover gives a pictorial view of a unique eye that learns to observe differences between quantum and classical effects in the space of surrounding networks.

Achievements:

• By extracting the purity of quantum states with the help of machine learning, a full understanding of the degradation in the state decoherence can also be unveiled in almost real time, providing metrics to the phase noise and loss mechanisms coupled from the environment and surrounding vacuum. Our methodology incorporated with machine learning is readily applicable for other quantum physical settings and gives physical descriptions of every feature observed in the quantum noise [2].
• How to improve our understanding of noisy quantum walks in networks with computer vision? we came up with an automated approach to study quantum transport properties and predict a possibility of a quantum advantage in particle transfer, with a specific neural network called classical-quantum convolutional neural network (CQCNN) [1].

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[4] Alexey Melnikov, Mohammad Kordzanganeh, Alexander Alodjants, and RKL," Quantum Machine Learning: from physics to software engineering," Advances in Phys. X (Review Article) 8, 2165452 (2023); [download].

[3] Hsien-Yi Hsieh, Jingyu Ning, Yi-Ru Chen, Hsun-Chung Wu, Hua Li Chen, Chien-Ming Wu, and RKL, "Direct parameter estimations from machine-learning enhanced quantum state tomography," Special Issue "Quantum Optimization & Machine Learning"; Symmetry 14, 874 (2022); [download].

[2] Hsien-Yi Hsieh, Yi-Ru Chen, Hsun-Chung Wu, Hua Li Chen, Jingyu Ning, Yao-Chin Huang, Chien-Ming Wu, and RKL, "Extract the Degradation Information in Squeezed States with Machine Learning,"Phys. Rev. Lett. 128, 073604 (2022); [download]. The first experimental paper from my own group.

[1] Alexey A. Melonikov, Leonid E. Fedichkin, RKL, and Alexander Alodjants, "Machine learning transfer efficiencies for noisy quantum walks," Adv. Quant. Tech. 3,1900115 (2020) [download];   Back Cover for Adv. Quantum Technol. 4/2020.  [link]

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Next:

Implementation of Quantum Machine Learning in IBM Q Experience!

[1] Anandu Kalleri Madhu, Alexey A. Melnikov, Leonid E. Fedichkin, Alexander Alodjants, and RKL, "Quantum walk processes in quantum devices," Heliyon 9, e13416 (2023); [download].

Quantum State Generation:

[1] Chien-Ming Wu, Shu-Rong Wu, Yi-Ru Chen, Hsun-Chung Wu, and RKL, Conference on Lasers and Electro-Optics (CLEO), paper JTu2A.38 (2019) [ Download].

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Quantum Measurement:

[1] Minyi Huang, RKL, Lijian Zhang, Shao-Ming Fei, and Junde Wu, "Simulating broken PT-symmetric Hamiltonian systems by weak measurement," Phys. Rev. Lett. 123, 080404 (2019) [download].

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Test of Quantum Mechanics:

[6] Minyi Huang, RKL, Qing-hai Wang, Guo-Qiang Zhang, and Junde Wu, "Solvable dilation model of time-dependent PT-symmetric systems," Phys. Rev. A 105, 062205 (2022); [download].

[5] Minyi Huang and RKL, "Internal nonlocality in generally dilated Hermiticity," Phys. Rev. A 105, 052210 (2022); [download].

[4] Hai Wang, RKL, and Junde Wu, "Discrete-time modeling of quantum evolutions, the energy-time uncertainty relation and general extensions in the entangled history formalism," [arXiv: 1908.02935].

[3] Hai Wang, RKL, Manish Kumar Shukla, Indranil Chakrabarty, Shaoming Fei, and Junde Wu, "Quantum Channels as Temporal Correlations in Quantum Mechanics," [arXiv: 1910.05694].

[2] Minyi Huang, RKL, and Junde Wu, "Extracting the internal nonlocality from the dilated Hermiticity," Phys. Rev. A 104, 012202 (2021); [download].

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[1] Yi-Chan Lee, Min-Hsiu Hsieh, Steven T. Flemmia, and RKL, "Local PT symmetry violates the no-signaling principle," Phys. Rev. Lett. 112, 130404 (2014) [download]; Editors' Suggestion; Featured in Physics: Reflecting on an Alternative Quantum Theory.  [link]

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Quantum Entanglement:

[6] Chung-Yun Hsieh, Yeong-Cherng Liang, and RKL, "Quantum steerability: Characterization, quantification, superactivation, and unbounded amplification," Phys. Rev. A 94, 062120 (2016) [download].

[5] You-Lin Chuang, RKL, and Ite A. Yu, "Generation of quantum entanglement based on electromagnetically induced transparency media," Opt. Express 29, 3928 (2021); [download].

[4] You-Lin Chuang and RKL, "Conditions to preserve quantum entanglement of quadrature fluctuation fields in electromagnetically induced transparency media," Opt. Lett. 34, 1537 (2009); also selected in Virtual Journal of Quantum Information 9, Issue 6 (2009) [download]

[3] You-Lin Chuang, Ite A. Yu, and RKL, "Nonseparated states from squeezed dark-state polaritons in electromagnetically induced transparency media," J. Opt. Soc. Am. B 32, 1384 (2015) [download].

[2] RKL, Yinchieh Lai, and Boris Malomed, "Generation of photon-number entangled soliton pairs through interactions," Phys. Rev. A 71, 013816 (2005); also selected in Virtual Journal of Quantum Information 5, Issue 2 (2005) [download].

[1] Yinchieh Lai and RKL, "Entangled Quantum Nonlinear Schrodinger Solitons," Phys. Rev. Lett. 103, 013902 (2009); also selected in Virtual Journal of Nanoscale Science & Technology 20, Issue 2 (2009); and selected in Virtual Journal of Quantum Information 9, Issue 7 (2009) [download].

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Horizons:

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Cavity-QED:

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Circuit-QED:

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Quantum Solitons:

 More

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Electromagnetically Induced Transparency (EIT):

[11] You-Lin Chuang, RKL, and Ite A. Yu, "Generation of quantum entanglement based on electromagnetically induced transparency media," Opt. Express 29, 3928 (2021); [download].

[10] Raul A. Robles Robles and RKL, "Quantum phase transition of a finite number of atoms in electromagnetically induced transparency media," J. Opt. Soc. Am. B 37, 1388 (2020) [download].

[9] You-Lin Chuang, RKL, and Ite A. Yu, "Optical-density-enhanced squeezed-light generation without optical cavities," Phys. Rev. A 96, 053818 (2017) [download].

[8] Muhammad Tariq, Ziauddin, Tahira Bano, Iftikhar Ahmad and RKL, " Cavity electromagnetically induced transparency via spontaneously generated coherence," J. Mod. Opt. 64, 1777 (2017) [download].

[7] Shaopeng Liu, Wen-Xing Yang, Zhoughu Zhu, Shasha Liu, and RKL, "Effective hyper-Raman scattering via inhibiting electromagnetically induced transparency in monolayer graphene under an external magnetic field," Opt. Lett. 41, 2891 (2016) [download].

[6] Shaopeng Liu, Wen-Xing Yang, Zhonghu Zhu, and RKL, "Effective terahertz signal detection via electromagnetically induced transparency in graphene," J. Opt. Soc. Am. B 33, 279 (2016) [download].

[5] You-Lin Chuang, Ite A. Yu, and RKL, "Quantum theory for pulse propagation in electromagnetically-induced-transparency media beyond the adiabatic approximation," Phys. Rev. A 91, 063818 (2015) [download].

[4] You-Lin Chuang, Ite A. Yu, and RKL, "Nonseparated states from squeezed dark-state polaritons in electromagnetically induced transparency media," J. Opt. Soc. Am. B 32, 1384 (2015) [download].

[3] Wen-Xing Yang, Ai-Xi Chen, Yanfeng Bai, and RKL, "Ultrafast single-electron transfer in coupled quantum dots driven by a few-cycle chirped pulse," J. Appl. Phys. 115, 143105 (2014) [download].

[2] Wen-Xing Yang, Ai-Xi Chen, Hao Guo, Yanfeng Bai, and RKL, "Carrier-envelope phase control electron transport in an asymmetric double quantum dot irradiated by a few-cycle pulse," Opt. Comm. 328, 96 (2014) [download].

[1] You-Lin Chuang and RKL, "Conditions to preserve quantum entanglement of quadrature fluctuation fields in electromagnetically induced transparency media," Opt. Lett. 34, 1537 (2009); also selected in Virtual Journal of Quantum Information 9, Issue 6 (2009) [download]

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Fluorescence Spectrum:

[1] RKL, and Yinchieh Lai, "Fluorescence squeezing spectra near a photonic bandgap," J. Opt. B: Quantum and Semiclassical Optics 6, S715 (special issue 2004); in memoriam of Hermann Anton Haus, 1925-2003 [download].

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Goos-Hanchen shift:

[6] Ziauddin, You-Lin Chuang, Sajid Qamar, and RKL, "Goos-Hanchen shift of partially coherent light fields in epsilon-near-zero metamaterials," Sci. Rep. 6, 26504 (2016) [download].

[5] Ziauddin, RKL, and Sajid Qamar, "Control of Goos-Hanchen shift via input probe field intensity," Opt. Comm. 379, 68 (2016) [download].

[4] Ziauddin, RKL, and Sajid Qamar, "Goos-Hanchen shifts of partially coherent light beams from a cavity with a four-level Raman gain medium," Opt. Comm. 374, 45 (2016) [download].

[3] Ziauddin, You-Lin Chuang, and RKL, "Giant Goos-Hanchen shift using PT-symmetry," Phys. Rev. A 92, 013815 (2015) [download].

[2] Ziauddin, You-Lin Chuang, and RKL, "Negative and positive Goos-Hanchen shifts of partially coherent light fields," Phys. Rev. A 91, 013803 (2015) [download].

[1] Wen-Xing Yang, Shaopeng Liu, Zhonghu Zhu, Ziaduddin, and RKL, "Tunneling-induced giant Goos-Hanchen shift in quantum wells," Opt. Lett. 40, 3133 (2015) [download].

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Atom Localization:

[5] Rahmatullah, Ziauddin, You-Lin Chuang, RKL, and Sajid Qamar, "Sub-microwave wavelength localization of Rydberg superatoms," J. Opt. Soc. Am. B 35, 2588 (2018) [download].

[4] Rahmatullah, You-Lin Chuang, RKL, and Sajid Qamar, "3D atom microscopy in the presence of Doppler shift," Laser Phys. Lett. 15, 035202 (2018) [download];

[3] Zhouhu Zhu, Wen-Xing Yang, Xiao-Tao Xia, Shasha Liu, Shaopeng Liu, and RKL, "Three-dimensional atom localization from spatial interference in a double two-level atomic system," Phys. Rev. A 94, 013826 (2016) [download].

[2] Zhouhu Zhu, Wen-Xing Yang, Ai-Xi Chen, Shasha Liu, Shaopeng Liu, and RKL, "Dressed-state analysis of efficient three-dimensional atom localization in a ladder-type three-level atomic system," Laser Phys. 26, 075203 (2016) [download].

[1] Zhonghu Zhu, Wen-Xing Yang, Ai-Xi Chen, Shaopeng Liu, and RKL, "Two-dimensional atom localization via phase-sensitive absorption-gain spectra in five-level hyper inverted-Y atomic systems," J. Opt. Soc. Am. B 32, 1070 (2015) [download].

Targets:

• Quantum-noise squeezing and correlations are two key quantum properties that can exhibit completely different characteristics when compared to the predictions of the classical theory. Almost all the proposed applications to quantum measurements and quantum information treatment utilize either one or both of these properties.
• The quantum nonlinear Schrodinger equation (QNLSE) has been widely used as a model equation for studying the quantum effects of bosonic solitons, i.e., the evolution equation of a one-dimensional bosonic system with δ-function interaction under the second quantization framework. In particular, solitons in optical fibers have been known to serve as a platform for demonstrating macroscopic quantum properties in optical fields, such as quadrature squeezing, amplitude squeezing, and both intra-pulse and inter-pulse correlations.
• Meanwhile, low-absorption, slow-light and quantum memory make electromagnetically induced transparency (EIT) to be a promising ingredient in the development of quantum technologies. In the scenario, quantum optical pulse propagation in EIT, quantum squeezing generation in coherent population trapping media, large cross-phase modulation at few-photon level, and quantum correlated light generation as well as multiple fields correlation have been actively studied.

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Achievements:

• Solitons after collision are rigorously proved to become quantum entangled in the sense that their quadrature components of suitably selected internal modes satisfy the inseparability criterion [10].
  
• The quantum-noise squeezing and quantum correlations are revealed for fiber solitons [2], Bragg solitons [1, 3], gap solitons in Bose-Einstein condensate [7], breathers [5, 6], bounded solitons in mode-locked fiber lasers [4, 8].
• A general quantum theory of self-induced transparency (SIT) solitons is developed with nonlinear quantum effects of atoms taken into account [9].
• The quantum fluctuation effects in the time-of-flight (TOF) experiment for a condensate released from an optical-lattice potential is studied within the truncated Wigner approximation [12].
  
• Beyond the adiabatic approximation, we develop a quantum theory for optical probe pulses propagating in electromagnetically-induced-transparency (EIT) media by including Langevin noise operators and asking the field operator to satisfy bosonic commutation relation [15, 16, 19].
• Considering matter wave bright solitons from weakly coupled Bose-Einstein condensates trapped in a double-well potential, we study the formation of macroscopic non- classical states, including Schrodinger-cat superposition state and maximally path entangled N00N-state. We have shown that solitons, as quantum nonlinear structured field objects, allow super-Heisenberg (SH) sensitivity, i.e. beyond Heisenberg limit, is one of the principal problems for current quantum metrology [17, 18].

[22] Alexander Alodjants, Dmitriy Tsarev, The Vinh Ngo, and RKL, "Enhanced nonlinear quantum metrology with weakly coupled solitons in the presence of particle losses," Phys. Rev. A 105, 012606 (2022); [download].

[21] The Vinh Ngo, Dmitriy Tsarev, RKL, and Alexander Alodjants, "Bose-Einstein condensate soliton qubit states for metrological applications," Sci. Rep. 111, 19363 (2021); [download].

[20] You-Lin Chuang, RKL, and Ite A. Yu, "Generation of quantum entanglement based on electromagnetically induced transparency media," Opt. Express 29, 3928 (2021); [download].

[19] D. V. Tsarev, A. P. Alodjants, T. V. Ngo, and RKL, "Mesoscopic quantum superposition states of weakly-coupled matter- wave solitons," New J. Phys. 22, 113016 (2020); [download].

[18] D. V. Tsarev, T. V. Ngo, RKL, and A. P. Alodjants, "Nonlinear quantum metrology with moving matter-wave solitons," New J. Phys. 21, 083041 (2019) [download].

[17] D. V. Tsarev, S. M. Arakelian, You-Lin Chuang, RKL, and A. P. Alodjants, "Quantum metrology beyond Heisenberg limit with entangled matter wave solitons," Optics Express 26, 19583 (2018) [download].

[16] You-Lin Chuang, RKL, and Ite A. Yu, "Optical-density-enhanced squeezed-light generation without optical cavities," Phys. Rev. A 96, 053818 (2017) [download].

[15] You-Lin Chuang, Ite A. Yu, and RKL, "Quantum theory for pulse propagation in electromagnetically-induced-transparency media beyond the adiabatic approximation," Phys. Rev. A 91, 063818 (2015) [download].

[14] You-Lin Chuang, Ite A. Yu, and RKL, "Nonseparated states from squeezed dark-state polaritons in electromagnetically induced transparency media," J. Opt. Soc. Am. B 32, 1384 (2015) [download].

[13] E. S. Sedov, A. P. Alodjants, S. M. Arakelian, You-Lin Chuang, YuanYao Lin, Wen-Xing Yang, and RKL, "Tunneling-assisted optical information storage with lattice polariton solitons in cavity-QED arrays," Phys. Rev. A 89, 033828 (2014) [download].

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[12] Shiang Fang, RKL, Daw-Wei Wang, "Quantum fluctuations and condensate fraction during time-of-flight expansion," Phys. Rev. A 82, 031601(R) (2010). [download]

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[11] You-Lin Chuang and RKL, "Conditions to preserve quantum entanglement of quadrature fluctuation fields in electromagnetically induced transparency media," Opt. Lett. 34, 1537 (2009); also selected in Virtual Journal of Quantum Information 9, Issue 6 (2009) [download]

[10] Yinchieh Lai and RKL, "Entangled Quantum Nonlinear Schrodinger Solitons," Phys. Rev. Lett. 103, 013902 (2009); also selected in Virtual Journal of Nanoscale Science & Technology 20, Issue 2 (2009); and selected in Virtual Journal of Quantum Information 9, Issue 7 (2009) [download].

[9] RKL and Yinchieh Lai, "Quantum squeezing and correlation of self-induced transparency solitons," Phys. Rev. A 80, 033839 (2009) [download].

[8] RKL, Yinchieh Lai, and Boris A. Malomed, "Photon-number fluctuation and correlation of bound soliton pairs in mode-locked fiber lasers," Opt. Lett. 34, 3084 (2005) [download].

[7] RKL, Elena A. Ostrovskaya, Yuri S. Kivshar, and Yinchieh Lai, "Quantum-noise properties of matter-wave gap solitons," Phys. Rev. A 72, 033607 (2005) [download].

[6] RKL, Yinchieh Lai, and Yuri S. Kivshar, "Quantum correlations in soliton collisions," Phys. Rev. A 71, 035801 (2005); also selected in Virtual Journal of Quantum Information 5, Issue 4 (2005) [download].

[5] RKL, Yinchieh Lai, and Boris Malomed, "Generation of photon-number entangled soliton pairs through interactions," Phys. Rev. A 71, 013816 (2005); also selected in Virtual Journal of Quantum Information 5, Issue 2 (2005) [download].

[4] RKL, Yinchieh Lai, and Boris Malomed, "Quantum correlations in bound-soliton pairs and trains in fiber lasers," Phys. Rev. A 70, 063817 (2004); also selected in Virtual Journal of Quantum Information 5, Issue 1 (2005) [download].

[3] RKL and Yinchieh Lai, "Quantum theory of fiber Bragg grating solitons," J. Opt. B: Quantum and Semiclassical Optics 6, S638 (special issue 2004) in memoriam of Hermann Anton Haus, 1925-2003 [download].

[2] RKL and Yinchieh Lai, and Boris A. Malomed, "Quantum Fluctuations around Bistable Solitons in the cubic-quintic nonlinear Schrodinger equation," J. Opt. B: Quantum and Semiclassical Optics 6, 367 (2004) [download].

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[1] RKL and Yinchieh Lai, "Amplitude-squeezed fiber-Bragg-grating solitons," Phys. Rev. A 69, 021801(R) (2004); also selected in Virtual Journal of Nanoscale Science & Technology 9, Issue 8 (2004) [download].

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Next:

Quantum Metrology with Quantum Solitons !

Scalable Quantum Photonic Chip with Error-Code Correction 矽基量子光電晶片:
MOST (Nov. 2019 - Dec. 2024)

Correlation Spectra in Nonlinear Modulational Instabilities and Rogue Waves:
US Navy, Office of Naval Research (ONR), Foreign Research Grant Award (Jan. 2019 - Jan. 2023)

Implementation, Design, Validation, and Applications of Quantum Photonic Chips: 國立清華大學競爭型研究團隊
MOE (Mar. 2022 - Feb. 2024)

Machine Learning for Hybrid Quantum Information Processing and Metrology 機器學習用在混合式量子訊息處理與量子度量衡:
Russia Foundation for Basic Research (RFBR)-MOST 108-2923-M-007-001-MY3 (Jan. 2019 - Dec. 2021)

Metrology and Application of Quantum Noise Squeezing 量子噪音壓縮的度量與應用:
MOST (Aug. 2020 - Jul. 2021)

Generation and Measurement on Squeezed Cats 壓縮貓態的產生與量測:
MOST (Aug. 2016 - Jul. 2020)

Geometric control of extreme waves 極限光波的幾何操控:
Italian National Research Council (CNR)-MOST (Jan. 2016 - Dec. 2018)

Theoretical and experimental study of polaritons in low dimensional micro- and nanostructures for spatially distributed quantum information 低維度微奈米結構中的極化子理論與實驗研究，與其在空間分散式量子訊息處理:
Russia Foundation for Basic Research (RFBR)-MOST (Jan. 2015 - Dec. 2017)

Theoretical and Experimental Study of Bosonic Lasers and Quantum Sources of Non-classical Matter Fields in Semiconductor Micro- and Nanostructures 微奈米結構玻色子雷射與非古典量子源之研究:
Russia Foundation for Basic Research (RFBR)-MOST (Jan. 2015 - Dec. 2017)

Thermo-dynamical properties in nonlinear optical systems 非線性光學系統中的熱力學特性:
MOST (Aug. 2012 - Jul. 2016)

Quantum information processing with polaritons in solid state and atomic micro- and nanostructures 原子與固態微奈米結構中極化子的量子資訊處理:
Russia Foundation for Basic Research (RFBR)-MOST (Jan. 2000 - Dec. 2013)

Nonlinear dynamics and quantum optics in dissipative systems 耗散系統中的非線性動力與量子光學 :
MOST (Aug. 2009 - Jul. 2012)

Few-photon quantum nonlinear optics 少光子數之量子非線性光學:
MOST (Aug. 2006 - Jul. 2009)

Quantum state transfer from optical solitons to atoms ant its application to quantum technologies 光孤子與原子間的量子狀態轉換及其在量子技術上的應用:
MOST (Aug. 2005 - Jul. 2006)

[177] Ole Steuernagel and RKL, "Adding or Subtracting a single Photon is the same for Pure Squeezed Vacuum States," [arXiv: 2410.21907].

[176] Ole Steuernagel and RKL, "Quantumness Measure from Phase Space Distributions," [arXiv: 2311.17399].

[175] Ole Steuernagel and RKL, "Wigner's Phase Space Current for Variable Beam Splitters -Seeing Beam Splitters in a New Light-," [arXiv: 2308.06706].

[174] Ole Steuernagel and RKL, "Photon Creation viewed from Wigner's Phase Space Current Perspective: The Simplest Possible Derivation of a Lindblad Superoperator Form," [arXiv: 2307.16510].

[173] Jeng Yi Lee, Hao-Yu Lu, and RKL, "Universal Law of Coiling for a Short Elastic Strip Contacting Within a Tube," [arXiv: 2303.08304].

[172] Yu-Han Chang, Nadia Daniela Rivera Torres, Santiago Figueroa Manrique, Raul A. Robles Robles, Vanna Chrismas Silalahi, Cen-Shawn Wu, Gang Wang, Giulia Marcucci, Laura Pilozzi, Claudio Conti, RKL, and Watson Kuo, "Probing topological protected transport in finite-sized Su-Schrieffer-Heeger chains," [arXiv: 2004.09282].

[171] Hai Wang, RKL, Manish Kumar Shukla, Indranil Chakrabarty, Shaoming Fei, and Junde Wu, "What are temporal correlations?," [arXiv: 1910.05694].

[170] Hai Wang, RKL, and Junde Wu, "Discrete-time modeling of quantum evolutions, the energy-time uncertainty relation and general extensions in the entangled history formalism," [arXiv: 1908.02935].

[LVK42] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for gravitational waves emitted from SN 2023ixf," [arXiv:2410.16565].

[LVK41] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "A search using GEO600 for gravitational waves coincident with fast radio bursts from SGR 1935+2154," [arXiv:2410.09151].

[LVK40] The Swift-BAT/GUANO Team, The Swift Collaboration, The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Swift-BAT GUANO follow-up of gravitational-wave triggers in the third LIGO-Virgo-KAGRA observing run," [arXiv:2407.12867].

[LVK39] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Observation of Gravitational Waves from the Coalescence of a 2.5−4.5 M⊙ Compact Object and a Neutron Star," ApJL 970, L34 (2024); [arXiv:2404.04248].

[LVK38] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Ultralight vector dark matter search using data from the KAGRA O3GK run," [arXiv:2403.03004].

[LVK37] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "A Joint Fermi-GBM and Swift-BAT Analysis of Gravitational-Wave Candidates from the Third Gravitational-wave Observing Run," [arXiv:2308.13666].

[LVK36] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for Eccentric Black Hole Coalescences during the Third Observing Run of LIGO and Virgo," [arXiv:2308.03822].

[LVK35] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for gravitational-lensing signatures in the full third observing run of the LIGO-Virgo network," [arXiv:2304.08393].

[LVK34] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Open Data from the Third Observing Run of LIGO, Virgo, KAGRA, and GEO," AstroPhys. J. Suppl. (ApJS) 267, 29 (2023);[arXiv:2302.03676].

[LVK33] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for subsolar-mass black hole binaries in the second part of Advanced LIGO's and Advanced Virgo's third observing run," Mon. Notices Royal Astron. Soc (MNRAS) stad588 (2023); [arXiv:2212.01477].

[LVK32] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for gravitational-wave transients associated with magnetar bursts in Advanced LIGO and Advanced Virgo data from the third observing run," [arXiv:2210.10931].

[LVK31] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Model-based cross-correlation search for gravitational waves from the low-mass X-ray binary Scorpius X-1 in LIGO O3 data," AstroPhys. J. Lett. 941, L30 (2022); [arXiv:2209.02863].

[LVK30] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for continuous gravitational wave emission from the Milky Way center in O3 LIGO--Virgo data," Phys. Rev. D 106, 042003 (2022); [arXiv: 2204.04523].

[LVK29] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for Gravitational Waves Associated with Fast Radio Bursts Detected by CHIME/FRB During the LIGO--Virgo Observing Run O3a," [arXiv: 2203.12038].

[LVK28] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "First joint observation by the underground gravitational-wave detector, KAGRA, with GEO 600," Prog. Theo. Exp. Phys. (PTEP) 2022, 063F01 (2022); [arXiv: 2203.01270]. The first joint observation of the KAGRA detector with GEO 600.

[LVK27] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO data," Phys. Rev. D 106, 062002 (2022); [arXiv: 2201.10104].

[LVK26] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search setup for long-duration transient gravitational waves from glitching pulsars during LIGO-Virgo third observing run," J. Phys.: Conference Series 2156, 01207 (2022); [arXiv: 2201.08785].

[LVK25] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO and Advanced Virgo O3 data," Phys. Rev. D 106, 102008 (2022); [arXiv: 2201.00697].

[LVK24] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Narrowband searches for continuous and long-duration transient gravitational waves from known pulsars in the LIGO-Virgo third observing run," AstroPhys. J. 932, 133 (2022); [arXiv: 2112.10990].

[LVK23] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Tests of General Relativity with GWTC-3," [arXiv: 2112.06861].

[LVK22] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "All-sky search for gravitational wave emission from scalar boson clouds around spinning black holes in LIGO O3 data," Phys. Rev. D 105, 102001 (2022); [arXiv: 2111.15507].

[LVK21] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs," AstroPhys. J. 935, 1 (2022); [arXiv: 2111.13106].

[LVK20] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "The population of merging compact binaries inferred using gravitational waves through GWTC-3," [arXiv: 2111.03634].

[LVK19] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for Gravitational Waves Associated with Gamma-Ray Bursts Detected by Fermi and Swift During the LIGO-Virgo Run O3b," AstroPhys. J. 928,186 (2022); [arXiv: 2111.03608].

[LVK18] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run," Phys. Rev. X 13,041039 (2023); [arXiv: 2111.03606].

[LVK17] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Population of Merging Compact Binaries Inferred Using Gravitational Waves through GWTC-3," Phys. Rev. X 13, 011048 (2023); [arXiv: 2111.03604].

[LVK16] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for Subsolar-Mass Binaries in the First Half of Advanced LIGO’s and Advanced Virgo’s Third Observing Run," Phys. Rev. Lett. 129, 061104 (2022); [arXiv: 2110.09834].

[LVK15] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "All-sky, all-frequency directional search for persistent gravitational waves from Advanced LIGO’s and Advanced Virgo’s first three observing runs," Phys. Rev. D 105, 122001 (2022); [arXiv: 2109.12197].

[LVK14] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for continuous gravitational waves from 20 accreting millisecond X-ray pulsars in O3 LIGO data," Phys. Rev. D 105, 022002 (2022); [arXiv: 2109.09255].

[LVK13] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "All-sky search for long-duration gravitational-wave bursts in the third Advanced LIGO and Advanced Virgo run," Phys. Rev. D 104, 102001 (2021); [arXiv: 2107.13796].

[LVK12] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "All-sky search for short gravitational-wave bursts in the third Advanced LIGO and Advanced Virgo run," Phys. Rev. D 104, 122004 (2021); [arXiv: 2107.03701].

[LVK11] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "All-sky search for continuous gravitational waves from isolated neutron stars in the early O3 LIGO data," Phys. Rev. D 104, 082004 (2021); [arXiv: 2107.00600].

[LVK10] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Observation of Gravitational Waves from Two Neutron Star–Black Hole Coalescences," AstroPhys. J. Lett. 915, L5 (2021); [download];  [arXiv: 2106.15163]. For the first time, the detection of a collision between a black hole and a neutron star is confirmed (in fact, two events occurring just 10 days apart in January 2020).

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[LVK9] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for intermediate mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo," Astronomy & Astrophysics (A&A) 659, A84 (2022); [arXiv: 2105.15120].

[LVK8] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Constraints on dark photon dark matter using data from LIGO's and Virgo's third observing run,"Phys. Rev. D 105, 063030 (2022); [arXiv: 2105.13085].

[LVK7] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Searches for continuous gravitational waves from young supernova remnants in the early third observing run of Advanced LIGO and Virgo," AstroPhys. J. 921, 80(2021); [arXiv: 2105.11641].

[LVK6] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Constraints from LIGO O3 data on gravitational-wave emission due to r-modes in the glitching pulsar PSR J0537-6910," AstroPhys. J. 922, 71 (2021); [arXiv: 2104.14417].

[LVK5] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for anisotropic gravitational-wave backgrounds using data from Advanced LIGO's and Advanced Virgo's first three observing runs," Phys. Rev. D 104, 022005 (2021); [arXiv: 2103.08520].

[LVK4] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Constraints on Cosmic Strings Using Data from the Third Advanced LIGO–Virgo Observing Run," Phys. Rev. Lett. 126, 241102 (2021); [download];   Editors' Suggestion; [arXiv: 2101.12248].

[LVK3] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Upper Limits on the Isotropic Gravitational-Wave Background from Advanced LIGO's and Advanced Virgo's Third Observing Run," Phys. Rev. D 104, 022004 (2021); [arXiv:2101.12130].

[LVK2] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Diving below the spin-down limit: constraints on gravitational waves from the energetic young pulsar PSR J0537-6910," AstroPhys. J. Lett. 913, L27 (2021); [download];  [arXiv: 2012.12926].

[LVK1] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Prospects for Observing and Localizing Gravitational-Wave Transients with Advanced LIGO, Advanced Virgo and KAGRA," Living Reviews in Relativity 23, 3 (2020) [download];  [link]; [arXiv: 1304.0670].

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[K12] The KAGRA Collaboration, "Overview of KAGRA: Data transfer and management," Prog. Theo. Exp. Phys. (PTEP) 2, 10A102 (2023).

[K11] The KAGRA Collaboration, "Input optics systems of the KAGRA detector during O3GK," Prog. Theo. Exp. Phys. (PTEP) 2, 023F01 (2023); [arXiv: 2210.05934].

[K10] The KAGRA Collaboration, "Noise subtraction from KAGRA O3GK data using Independent Component Analysis," Class. Quantum Grav. 40 085015 (2023); [arXiv: 2206.05785].

[K9] The KAGRA Collaboration, "The Current Status and Future Prospects of KAGRA, the Large-Scale Cryogenic Gravitational Wave Telescope Built in the Kamioka Underground," Galaxies 10, 63 (2022); [download].

[K8] The KAGRA Collaboration, "Performance of the KAGRA detector during the first joint observation with GEO 600 (O3GK)," Prog. Theo. Exp. Phys. (PTEP) 2023, 10A101 (2023); [arXiv: 2203.07011].

[K7] The KAGRA Collaboration, "Radiative Cooling of the Thermally Isolated System in KAGRA Gravitational Wave Telescope," J. Phys.: Conference Series 1857, 012002 (2021); [download].

[K6] The KAGRA Collaboration, "Vibration isolation systems for the beam splitter and signal recycling mirrors of the KAGRA gravitational wave detector," Class. Quantum Grav. 38, 065011 (2021); [download].

[K5] The KAGRA Collaboration, "Overview of KAGRA: Calibration, detector characterization, physical environmental monitors, and the geophysics interferometer," Prog. Theo. Exp. Phys. (PTEP) 2021, 05A102 (2021); [download].

[K4] The KAGRA Collaboration, "Overview of KAGRA: Detector design and construction history," Prog. Theo. Exp. Phys. (PTEP) 2020, 05A101 (2020); [download].

[K3] The KAGRA Collaboration, "Overview of KAGRA : KAGRA science," Prog. Theo. Exp. Phys. (PTEP) 2020, 05A103 (2020); [download].

[K2] The KAGRA Collaboration, "Application of independent component analysis to the iKAGRA data," Prog. Theo. Exp. Phys. (PTEP) 2020, 053F01 (2020); [download].

[K1] The KAGRA Collaboration, "An arm length stabilization system for KAGRA and future gravitational-wave detectors," Class. Quantum Grav. 37, 035004 (2020) [download].

[169] Hsien-Yi Hsieh, Yi-Ru Chen, Jingyu Ning, Hsun-Chung Wu, Hua Li Chen, Zi-Hao Shi, Po-Han Wang, Ole Steuernagel, Chien-Ming Wu, and RKL, "Neural Network Enhanced Single-Photon Fock State Tomography," Phys. Rev. A (2024); [arXiv: 2405.02812].

[168] Yi-Ru Chen, Hsien-Yi Hsieh, Jingyu Ning, Hsun-Chung Wu, Hua Li Chen, Zi-Hao Shi, Popo Yang, Ole Steuernagel, Chien-Ming Wu, and RKL, ""Generation of heralded optical cat states by photon addition," Phys. Rev. A 110, 023703 (2024); [download].

[167] RKL, "Machine-learning enhanced quantum state tomography and quantum noise reduction to the advanced gravitational wave detectors," Proc. of SPIE 12912, 1291213 (2024); Quantum Sensing, Imaging, and Precision Metrology II, SPIE Quantum West, San Francisco, California, United States; [download].

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[LVK39] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Observation of Gravitational Waves from the Coalescence of a 2.5−4.5 M⊙ Compact Object and a Neutron Star," ApJL 970, L34 (2024); [arXiv:2404.04248].

[166] Alexey Melnikov, Mohammad Kordzanganeh, Alexander Alodjants, and RKL," Quantum Machine Learning: from physics to software engineering," Advances in Phys. X (Review Article) 8, 2165452 (2023); [download].

[165] Dmitriy Tsarev, Stepan Osipov, RKL, Sergey Kulik, and Alexander Alodjants, "Quantum sensor network metrology with bright solitons," Phys. Rev. A 108, 062612 (2023); [download].

[164] Yi-Ru Chen, Hsien-Yi Hsieh, Jingyu Ning, Hsun-Chung Wu, Hua Li Chen, You-Lin Chuang, Popo Yang, Ole Steuernagel, Chien-Ming Wu, and RKL, "Experimental reconstruction of Wigner phase-space current," Phys. Rev. A 108, 023729 (2023); [download].

[163] Jen-Hsu Chang, Chun-Yan Lin, and RKL, "Interplay between intensity-dependent dispersion and Kerr nonlinearity on the soliton formation," Opt. Lett. 48, 4249 (2023); [download].

[162] Anandu Kalleri Madhu, Alexey A. Melnikov, Leonid E. Fedichkin, Alexander Alodjants, and RKL, "Quantum walk processes in quantum devices," Heliyon 9, e13416 (2023); [download].

[161] Ole Steuernagel, Popo Yang, and RKL, "On the Formation of Lines in Quantum Phase Space," J. Phys. A 56, 015306 (2023); [download].

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[LVK34] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Open Data from the Third Observing Run of LIGO, Virgo, KAGRA, and GEO," AstroPhys. J. Suppl. (ApJS) 267, 29 (2023);[arXiv:2302.03676].

[LVK33] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for subsolar-mass black hole binaries in the second part of Advanced LIGO's and Advanced Virgo's third observing run," Mon. Notices Royal Astron. Soc (MNRAS) stad588 (2023); [arXiv:2212.01477].

[LVK18] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "GWTC-3: Compact Binary Coalescences Observed by LIGO and Virgo During the Second Part of the Third Observing Run," Phys. Rev. X 13,041039 (2023); [arXiv: 2111.03606].

[LVK17] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Population of Merging Compact Binaries Inferred Using Gravitational Waves through GWTC-3," Phys. Rev. X 13, 011048 (2023); [arXiv: 2111.03604].

[K12] The KAGRA Collaboration, "Overview of KAGRA: Data transfer and management," Prog. Theo. Exp. Phys. (PTEP) 2, 10A102 (2023).

[K11] The KAGRA Collaboration, "Input optics systems of the KAGRA detector during O3GK," Prog. Theo. Exp. Phys. (PTEP) 2, 023F01 (2023); [arXiv: 2210.05934].

[K10] The KAGRA Collaboration, "Noise subtraction from KAGRA O3GK data using Independent Component Analysis," Class. Quantum Grav. 40 085015 (2023); [arXiv: 2206.05785].

[K8] The KAGRA Collaboration, "Performance of the KAGRA detector during the first joint observation with GEO 600 (O3GK)," Prog. Theo. Exp. Phys. (PTEP) 2023, 10A101 (2023); [arXiv: 2203.07011].

[160] Hsien-Yi Hsieh, Yi-Ru Chen, Hsun-Chung Wu, Hua Li Chen, Jingyu Ning, Yao-Chin Huang, Chien-Ming Wu, and RKL, "Extract the Degradation Information in Squeezed States with Machine Learning," Phys. Rev. Lett. 128, 073604 (2022); [download]. The first experimental paper from my own group.

[159] Minyi Huang, RKL, Qing-hai Wang, Guo-Qiang Zhang, and Junde Wu, "Solvable dilation model of time-dependent PT-symmetric systems," Phys. Rev. A 105, 062205 (2022); [download].

[158] Minyi Huang and RKL, "Internal nonlocality in generally dilated Hermiticity," Phys. Rev. A 105, 052210 (2022); [download].

[157] Alexander Alodjants, Dmitriy Tsarev, The Vinh Ngo, and RKL, "Enhanced nonlinear quantum metrology with weakly coupled solitons in the presence of particle losses," Phys. Rev. A 105, 012606 (2022); [download].

[156] Yuhang Zhao, Eleonora Capocasa, Marc Eisenmann, Naoki Aritomi, Michael Page, Yuefan Guo, Eleonora Polini, Koji Arai, Yoichi Aso, Martin van Beuzekom, Yao-Chin Huang, RKL, Harald Luck, Osamu Miyakawa, Pierre Prat, Ayaka Shoda, Matteo Tacca, Ryutaro Takahashi, Henning Vahlbruch, Marco Vardaro, Chien-Ming Wu, Matteo Leonardi, Matteo Barsuglia, and Raffaele Flaminio, "Improving the stability of frequency dependent squeezing with bichromatic control of filter cavity length, alignment, and incident beam pointing," Phys. Rev. D 105, 082003 (2022); [download].

[155] Naoki Aritomi, Yuhang Zhao, Eleonora Capocasa, Matteo Leonardi, Marc Eisenmann, Michael Page, Yuefan Guo, Eleonora Polini, Akihiro Tomura, Koji Arai, Yoichi Aso, Martin van Beuzekom, Yao-Chin Huang, RKL, Harald Luck, Osamu Miyakawa, Pierre Prat, Ayaka Shoda, Matteo Tacca, Ryutaro Takahashi, Henning Vahlbruch, Marco Vardaro, Chien-Ming Wu, Matteo Barsuglia, and Raffaele Flaminio, "Demonstration of length control for a filter cavity with coherent control sidebands," Phys. Rev. D 106, 102003 (2022); [download].

[154] Tao Shui, Wen-Xing Yang, Mu-Tian Cheng, and RKL, "Optical nonreciprocity and nonreciprocal photonic devices with directional four-wave mixing effect," Opt. Express 30, 6284 (2022); [download].

[153] Zhen-Ting Huang, Kuo-Bin Hong, RKL, Laura Pilozzi, Claudio Conti, Jhih-Sheng Wu, and Tien-Chang Lu, "Pattern-tunable synthetic gauge fields in topological photonic graphene," Nanophotonics 11, 1297 (2022); [download].

[152] A. F. Munoz Espinosa, RKL, and Blas M. Rodriguez-Lara, "Non-classical light state transfer in su(2) resonator networks," Sci. Rep. 12, 10505 (2022); [download].

[151] Jen-Hsu Chang, Chun-Yan Lin, and RKL, "Quantum harmonic oscillators with nonlinear effective masses in the weak density approximation," Physica Scripta 97, 025205 (2022); [download].

[150] Jayanta Bera, Barun Halder, Suranjana Ghosh, RKL, Utpal Roy, "Quantum Sensing with Sub-Planck Structures for the Dynamics of Bose-Einstein Condensate in Presence of Engineered Potential Barriers inside a Harmonic Trap," Phys. Lett. A 453, 128484 (2022); [download].

[149] Hsien-Yi Hsieh, Jingyu Ning, Yi-Ru Chen, Hsun-Chung Wu, Hua Li Chen, Chien-Ming Wu, and RKL, "Direct parameter estimations from machine-learning enhanced quantum state tomography," Special Issue "Quantum Optimization & Machine Learning"; Symmetry 14, 874 (2022); [download].

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[LVK31] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Model-based cross-correlation search for gravitational waves from the low-mass X-ray binary Scorpius X-1 in LIGO O3 data," AstroPhys. J. Lett. 941, L30 (2022); [arXiv:2209.02863].

[LVK30] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for continuous gravitational wave emission from the Milky Way center in O3 LIGO--Virgo data," Phys. Rev. D 106, 042003 (2022); [arXiv: 2204.04523].

[LVK28] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "First joint observation by the underground gravitational-wave detector, KAGRA, with GEO 600," Prog. Theo. Exp. Phys. (PTEP) 2022, 063F01 (2022); [arXiv: 2203.01270]. The first joint observation of the KAGRA detector with GEO 600.

[LVK27] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for gravitational waves from Scorpius X-1 with a hidden Markov model in O3 LIGO data," Phys. Rev. D 106, 062002 (2022); [arXiv: 2201.10104].

[LVK25] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "All-sky search for continuous gravitational waves from isolated neutron stars using Advanced LIGO and Advanced Virgo O3 data," Phys. Rev. D 106, 102008 (2022); [arXiv: 2201.00697].

[LVK24] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Narrowband searches for continuous and long-duration transient gravitational waves from known pulsars in the LIGO-Virgo third observing run," AstroPhys. J. 932, 133 (2022); [arXiv: 2112.10990].

[LVK22] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "All-sky search for gravitational wave emission from scalar boson clouds around spinning black holes in LIGO O3 data," Phys. Rev. D 105, 102001 (2022); [arXiv: 2111.15507].

[LVK21] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Searches for Gravitational Waves from Known Pulsars at Two Harmonics in the Second and Third LIGO-Virgo Observing Runs," AstroPhys. J. 935, 1 (2022); [arXiv: 2111.13106].

[LVK19] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for Gravitational Waves Associated with Gamma-Ray Bursts Detected by Fermi and Swift During the LIGO-Virgo Run O3b," AstroPhys. J. 928,186 (2022); [arXiv: 2111.03608].

[LVK16] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for Subsolar-Mass Binaries in the First Half of Advanced LIGO’s and Advanced Virgo’s Third Observing Run," Phys. Rev. Lett. 129, 061104 (2022); [arXiv: 2110.09834].

[LVK15] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "All-sky, all-frequency directional search for persistent gravitational waves from Advanced LIGO’s and Advanced Virgo’s first three observing runs," Phys. Rev. D 105, 122001 (2022); [arXiv: 2109.12197].

[LVK14] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for continuous gravitational waves from 20 accreting millisecond X-ray pulsars in O3 LIGO data," Phys. Rev. D 105, 022002 (2022); [arXiv: 2109.09255].

[LVK9] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for intermediate mass black hole binaries in the third observing run of Advanced LIGO and Advanced Virgo," Astronomy & Astrophysics (A&A) 659, A84 (2022); [arXiv: 2105.15120].

[LVK8] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Constraints on dark photon dark matter using data from LIGO's and Virgo's third observing run,"Phys. Rev. D 105, 063030 (2022); [arXiv: 2105.13085].

[K9] The KAGRA Collaboration, "The Current Status and Future Prospects of KAGRA, the Large-Scale Cryogenic Gravitational Wave Telescope Built in the Kamioka Underground," Galaxies 10, 63 (2022); [download].

[148] Minyi Huang, RKL, and Junde Wu, "Extracting the internal nonlocality from the dilated Hermiticity," Phys. Rev. A 104, 012202 (2021); [download].

[147] Jeng Yi Lee, Lujun Huang, Lei Xu, Andrey E. Miroshnichenko, and RKL, "Broadband control on scattering events with interferometric coherent waves," New J. Phys. 23, 063014 (2021); [download].

[146] You-Lin Chuang, RKL, and Ite A. Yu, "Generation of quantum entanglement based on electromagnetically induced transparency media," Opt. Express 29, 3928 (2021); [download].

[145] The Vinh Ngo, Dmitriy Tsarev, RKL, and Alexander Alodjants, "Bose-Einstein condensate soliton qubit states for metrological applications," Sci. Rep. 111, 19363 (2021); [download].

[144] Chun-Yan Lin, Giulia Marcucci, You-Lin Chuang, Gang Wang, Claudio Conti, and RKL, "Multidimensional topological strings by curved potentials: Simultaneous realization of mobility edge and topological protection," OSA Continuum 4, 315 (2021); [download].

---

[LVK29] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for continuous gravitational wave emission from the Milky Way center in O3 LIGO-Virgo data," Phys. Rev. D 106, 042003 (2022); [arXiv: 2203.12038].

[LVK13] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "All-sky search for long-duration gravitational-wave bursts in the third Advanced LIGO and Advanced Virgo run," Phys. Rev. D 104, 102001 (2021); [arXiv: 2107.13796].

[LVK12] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "All-sky search for short gravitational-wave bursts in the third Advanced LIGO and Advanced Virgo run," Phys. Rev. D 104, 122004 (2021); [arXiv: 2107.03701].

[LVK11] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "All-sky search for continuous gravitational waves from isolated neutron stars in the early O3 LIGO data," Phys. Rev. D 104, 082004 (2021); [arXiv: 2107.00600].

[LVK10] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Observation of Gravitational Waves from Two Neutron Star–Black Hole Coalescences," AstroPhys. J. Lett. 915, L5 (2021); [download];  [arXiv: 2106.15163]. For the first time, the detection of a collision between a black hole and a neutron star is confirmed (in fact, two events occurring just 10 days apart in January 2020).

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[LVK7] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Searches for continuous gravitational waves from young supernova remnants in the early third observing run of Advanced LIGO and Virgo," AstroPhys. J. 921, 80(2021); [arXiv: 2105.11641].

[LVK6] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Constraints from LIGO O3 data on gravitational-wave emission due to r-modes in the glitching pulsar PSR J0537-6910," AstroPhys. J. 922, 71 (2021); [arXiv: 2104.14417].

[LVK5] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Search for anisotropic gravitational-wave backgrounds using data from Advanced LIGO's and Advanced Virgo's first three observing runs," Phys. Rev. D 104, 022005 (2021); [arXiv: 2103.08520].

[LVK4] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Constraints on Cosmic Strings Using Data from the Third Advanced LIGO–Virgo Observing Run," Phys. Rev. Lett. 126, 241102 (2021); [download];   Editors' Suggestion; [arXiv: 2101.12248].

[LVK3] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Upper Limits on the Isotropic Gravitational-Wave Background from Advanced LIGO's and Advanced Virgo's Third Observing Run," Phys. Rev. D 104, 022004 (2021); [arXiv:2101.12130].

[LVK2] The LIGO Scientific Collaboration, the Virgo Collaboration, and the KAGRA Collaboration, "Diving below the spin-down limit: constraints on gravitational waves from the energetic young pulsar PSR J0537-6910," AstroPhys. J. Lett. 913, L27 (2021); [download];  [arXiv: 2012.12926].

[K7] The KAGRA Collaboration, "Radiative Cooling of the Thermally Isolated System in KAGRA Gravitational Wave Telescope," J. Phys.: Conference Series 1857, 012002 (2021); [download].

[K6] The KAGRA Collaboration, "Vibration isolation systems for the beam splitter and signal recycling mirrors of the KAGRA gravitational wave detector," Class. Quantum Grav. 38, 065011 (2021); [download].

[K5] The KAGRA Collaboration, "Overview of KAGRA: Calibration, detector characterization, physical environmental monitors, and the geophysics interferometer," Prog. Theo. Exp. Phys. (PTEP) 2021, 05A102 (2021); [download]. [citations > 10]

• Ite A. Yu (余怡德); Department of Physics, National Tsing Hua University, Hsinchu
  [4] You-Lin Chuang, RKL, and Ite A. Yu, "Generation of quantum entanglement based on electromagnetically induced transparency media," Opt. Express 29, 3928 (2021); [download].
  
  [3] You-Lin Chuang, RKL, and Ite A. Yu, "Optical-density-enhanced squeezed-light generation without optical cavities," Phys. Rev. A 96, 053818 (2017) [download].
  
  [2] You-Lin Chuang, Ite A. Yu, and RKL, "Quantum theory for pulse propagation in electromagnetically-induced-transparency media beyond the adiabatic approximation," Phys. Rev. A 91, 063818 (2015) [download].
  
  [1] You-Lin Chuang, Ite A. Yu, and RKL, "Nonseparated states from squeezed dark-state polaritons in electromagnetically induced transparency media," J. Opt. Soc. Am. B 32, 1384 (2015) [download].
  

  ---

  
  
  
• Daw-Wei Wang (王道維); Department of Physics, National Tsing Hua University, Hsinchu
  [2] Ching-Hao Wang, Tzay-Ming Hong, RKL, and Daw-Wei Wang, "Particle-wave duality in quantum tunneling of a bright soliton," Optics Express 20, 22675 (2012) [download].
  
  [1] Shiang Fang, RKL, Daw-Wei Wang, "Quantum fluctuations and condensate fraction during time-of-flight expansion," Phys. Rev. A 82, 031601(R) (2010). [download]
  

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• Chih-Sung Chuu (褚志崧); Department of Physics, National Tsing Hua University, Hsinchu
  
  
• Mark Ming-Chang Lee (李明昌); Institute of Photonics Technologies, National Tsing Hua University, Hsinchu



• Shang-Da Yang (楊尚達); Institute of Photonics Technologies, National Tsing Hua University, Hsinchu
  [1] Ludmila Praxmeyer, Chih-Cheng Chen, Popo Yang, Shang-Da Yang, and RKL, "Direct measurement of time-frequency analogs of sub-Planck structures," Phys. Rev. A 93, 053835 (2016) [download].
  

  ---

  
  
  
• Chi-Yang Lee (李紫原); Department of Materials Science and Engineering, National Tsing Hua University, Hsinchu
  [3] Jeng-Yi Lee, Min-Chiao Tsai, Po-Chin Chen, Tin-Tin Chen, Kuei-Lin Chan, Chi-Young Lee , and RKL, "Thickness effect on light absorption and scattering for nanoparticles in shape of hollow-spheres," J. Phys. Chem: C 119, 25754 (2015) [download].
  
  [2] Min-Chiao Tsai, Jeng-Yi Lee, Ya-Chen Chang, Min-Han Yang, Tin-Tin Chen, I-Chun Chang, Pei-Chi Lee, Hsin-Tien Chiu, RKL, and Chi-Young Lee, "Scattering resonance enhanced dye absorption of dye sensitized solar cells at optimized hollow structure size," J. Power Sources 268, 1 (2014) [download].
  
  [1] Min-Chiao Tsai, Jeng-Yi Lee, Po-Chin Chen, Yuan-Wei Chang, Ya-Chen Chang, Min-Han Yang, Hsin-Tien Chiu, I-Nan Lin, RKL, and Chi-Young Lee, "Effects of size and shell thickness of TiO2 hierarchical hollow spheres on photocatalytic behavior: An experimental and theoretical study," Applied Catalysis B: Environmental 147, 499 (2014) [download].

  ---

  
  
  
• Hao-Wei Huang (黃皓瑋); Department of Mathematics, National Tsing Hua University

  ---

  
  
  
• Yinchieh Lai (賴暎杰); Department of Photonics, National Chiao-Tung University, Hsinchu
  [10] Yinchieh Lai and RKL, "Entangled Quantum Nonlinear Schrodinger Solitons," Phys. Rev. Lett. 103, 013902 (2009); also selected in Virtual Journal of Nanoscale Science & Technology 20, Issue 2 (2009); and selected in Virtual Journal of Quantum Information 9, Issue 7 (2009) [download].
  
  [9] RKL and Yinchieh Lai, "Quantum squeezing and correlation of self-induced transparency solitons," Phys. Rev. A 80, 033839 (2009) [download].
  
  [8] RKL, Yinchieh Lai, and Boris A. Malomed, "Photon-number fluctuation and correlation of bound soliton pairs in mode-locked fiber lasers," Opt. Lett. 34, 3084 (2005) [download].
  
  [7] RKL, Elena A. Ostrovskaya, Yuri S. Kivshar, and Yinchieh Lai, "Quantum-noise properties of matter-wave gap solitons," Phys. Rev. A 72, 033607 (2005) [download].
  
  [6] RKL, Yinchieh Lai, and Yuri S. Kivshar, "Quantum correlations in soliton collisions," Phys. Rev. A 71, 035801 (2005); also selected in Virtual Journal of Quantum Information 5, Issue 4 (2005) [download].
  
  [5] RKL, Yinchieh Lai, and Boris Malomed, "Generation of photon-number entangled soliton pairs through interactions," Phys. Rev. A 71, 013816 (2005); also selected in Virtual Journal of Quantum Information 5, Issue 2 (2005) [download].
  
  [4] RKL, Yinchieh Lai, and Boris Malomed, "Quantum correlations in bound-soliton pairs and trains in fiber lasers," Phys. Rev. A 70, 063817 (2004); also selected in Virtual Journal of Quantum Information 5, Issue 1 (2005) [download].
  
  [3] RKL and Yinchieh Lai, "Quantum theory of fiber Bragg grating solitons," J. Opt. B: Quantum and Semiclassical Optics 6, S638 (special issue 2004) in memoriam of Hermann Anton Haus, 1925-2003 [download].
  
  [2] RKL and Yinchieh Lai, and Boris A. Malomed, "Quantum Fluctuations around Bistable Solitons in the cubic-quintic nonlinear Schrodinger equation," J. Opt. B: Quantum and Semiclassical Optics 6, 367 (2004) [download].
  
  [1] RKL and Yinchieh Lai, "Amplitude-squeezed fiber-Bragg-grating solitons," Phys. Rev. A 69, 021801(R) (2004); also selected in Virtual Journal of Nanoscale Science & Technology 9, Issue 8 (2004) [download].
  

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• Tsin-Fu Jiang (江進福); Institute of Physics, National Chiao-Tung University, Hsinchu
  [1] YuanYao Lin, RKL, Yee-Mou Kao, and Tsin-Fu Jiang, "Band structures of a dipolar Bose-Einstein condensate in one-dimensional lattices," Phys. Rev. A 78, 023629 (2008) [download].
  

  ---

  
  
  
• Tien-chang Lu (盧廷昌); Department of Photonics, National Chiao-Tung University, Hsinchu
  [4] Zhen-Ting Huang, Kuo-Bin Hong, RKL, Laura Pilozzi, Claudio Conti, Jhih-Sheng Wu, and Tien-Chang Lu, "Pattern-tunable synthetic gauge fields in topological photonic graphene," Nanophotonics 11, 1297 (2022); [download].
  
  [3] Yu-Chi Wang, Heng Li, Yu-Heng Hong, Kuo-Bin Hong, Fang-Chung Chen, Chia-Hung Hsu, RKL, Claudio Conti, Tsung Sheng Kao, and Tien-Chang Lu, "Flexible Organometal-Halide Perovskite Lasers for Speckle Reduction in Imaging Projection," ACS Nano 13, 5421 (2019) [download].
  
  [2] Kou-Bin Hong, Chun-Yan Lin, Tsu-Chi Chang, Wei-Hsuan Liang, Ying-Yu Lai, Chien-Ming Wu, You-Lin Chuang, Tien-Chang Lu, Claudio Conti, and RKL, "Lasing on nonlinear localized waves in curved geometry," Optics Express 25, 29068 (2017) [download].
  
  [1] Yonan Su, Chun-Yan Lin, Ray-Ching Hong, Wen-Xing Yang, Chien-Chung Jeng, Tien-Chang Lu, and RKL "Lasing on surface states in vertical-cavity surface-emission lasers," Opt. Lett. 39, 5582 (2014) [download].
  

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• Po-Tsung Lee (李柏璁); Department of Photonics, National Chiao-Tung University, Hsinchu
  
  
• Ching-Yi Lai (賴青沂); Department of Electrical Engineering, National Chiao-Tung University
  [1] Li-Yi Hsu, Ching-Yi Lai, You-Chia Chang, Chien-Ming Wu, and RKL, "Carrying an arbitrarily large amount of information using a single quantum particle," Phys. Rev. A 102, 022620 (2020); [download].
  

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• Hao-Chung Cheng (鄭浩中); Department of Electrical Engineering, National Taiwan University

  ---

  
  
  
• Jun-Yi Wu (吳俊毅); Department of Physics, Tamkang University

  ---

  
  
  
• Yen-Hung Chen (陳彥宏); Department of Photonics, National Central University, Taoyuan
  
  
• Queena Yi-Shan Lee (李依珊); Department of Electrical Engineering, National Central University, Taoyuan
  
  
• Ming-Feng Shih (石明豐): Department of Physics, National Taiwan University, Taipei
  [2] Ray-Ching Hong, Chun-Yan Lin, You-Lin Chuang, Chien-Ming Wu, Yonan Su, Jeng Yi Lee, Chien-Chung Jeng, Ming-Feng Shih, and RKL, "Resonance in modulation instability from non-instantaneous nonlinearities," Opt. Lett. 43, 3329 (2018) [download].
  
  [1] Ming Shen, Yonan Su, Ray-Ching Hong, YuanYao Lin, Chien-Chung Jeng, Min-Feng Shih, and RKL, "Observation of phase boundaries in spontaneous optical pattern formation," Phys. Rev. A 91, 023810 (2015) [download].
  

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• Chien-Chung Jeng (鄭建宗), Department of Physics, National Chung Hsing University, Taichung
  [10] Ray-Ching Hong, Chun-Yan Lin, You-Lin Chuang, Chien-Ming Wu, Yonan Su, Jeng Yi Lee, Chien-Chung Jeng, Ming-Feng Shih, and RKL, "Resonance in modulation instability from non-instantaneous nonlinearities," Opt. Lett. 43, 3329 (2018) [download].
  
  [9] Chien-Chung Jeng, Yonan Su, Ray-Ching Hong, and RKL, "Control modulation instability in photorefractive crystals by the intensity ratio of background to signal fields," Optics Express 23, 10266 (2015) [download].
  
  [8] Ming Shen, Yonan Su, Ray-Ching Hong, YuanYao Lin, Chien-Chung Jeng ,, Min-Feng Shih, and RKL, "Observation of phase boundaries in spontaneous optical pattern formation," Phys. Rev. A 91, 023810 (2015) [download].
  
  [7] Yonan Su, Chun-Yan Lin, Ray-Ching Hong, Wen-Xing Yang, Chien-Chung Jeng , Tien-Chang Lu, and RKL "Lasing on surface states in vertical-cavity surface-emission lasers," Opt. Lett. 39, 5582 (2014) [download].
  
  [6] L. Chen, Q. Wang, Ming Shen, H. Zhao, Y.Y. Lin, Chien-Chung Jeng , RKL, and W. Krolikowski, "Nonlocal dark solitons under competing cubic-quintic nonlinearities," Opt. Lett. 38, 13 (2013) [download].
  
  [5] Ming Shen, J.-J. Zheng, Q. Kong, YuanYao Lin, Chien-Chung Jeng, RKL, and W. Krolikowski, "Stabilization of counter-rotating vortex pairs in nonlocal media," Phys. Rev. A 86, 013827 (2012) [download].
  
  [4] Chandroth P. Jisha, Kuei-Chu Hsu, YuanYao Lin, Ja-Hon Lin, Chien-Chung Jeng, and RKL, "Tunable pattern transitions in a liquid-crystal-monomer mixture using two-photon polymerization," Opt. Lett. 37, 4931 (2012) [download].
  
  [3] Ming Shen, YuanYao Lin, Chien-Chung Jeng, and RKL, "Vortex pairs in nonlocal nonlinear meida," J. Opt. 14, 065204 (2012) [download].
  
  [2] Ming Shen, Qian Kong, Chien-Chung Jeng, Li-Juan Ge, RKL, and Wieslaw Krolikowski, "Instability suppression of vector-necklace-ring solitons in nonlocal media," Phys. Rev. A 83, 023825 (2011) [download].
  
  [1] Chien-Chung Jeng, YuanYao Lin, Ray-Ching Hong, and RKL, "Optical Pattern Transitions from Modulation to Transverse Instabilities in Photorefractive Crystals," Phys. Rev. Lett. 102, 153905 (2009) [download].
  

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• Watson Kuo (郭華丞), Department of Physics, National Chung Hsing University, Taichung
  [1] Yu-Han Chang, Nadia Daniela Rivera Torres, Santiago Figueroa Manrique, Raul A. Robles Robles, Vanna Chrismas Silalahi, Cen-Shawn Wu, Gang Wang, Giulia Marcucci, Laura Pilozzi, Claudio Conti, RKL, and Watson Kuo, "Probing topological protected transport in finite-sized Su-Schrieffer-Heeger chains," [arXiv: 2004.09282].
  

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• Jen-Hsu Chang (張仁煦), Graduate School of National Defense, National Defense University, Taoyuan
  [3] Jen-Hsu Chang, Chun-Yan Lin, and RKL, "Interplay between intensity-dependent dispersion and Kerr nonlinearity on the soliton formation," Opt. Lett. 48, 4249 (2023); [download].
  
  [2] Jen-Hsu Chang, Chun-Yan Lin, and RKL, "Quantum harmonic oscillators with nonlinear effective masses in the weak density approximation," Physica Scripta 97, 025205 (2022); [download].
  
  [1] Chun-Yan Lin, Jen-Hsu Chang, Gershon Kurizki, and RKL, "Solitons supported by intensity-dependent dispersion," Opt. Lett. 45, 1471 (2020) [download].
  

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• Shin-Tza Wu (吳欣澤), Department of Physics, National Chung Cheng University, Chiayi
  [1] Popo Yang, Ivan F. Valtierra, Andrei B. Klimov, Shin-Tza Wu, RKL, and Luis L. Sanchez-Soto, and Gerd Leuchs, "The Wigner flow on the sphere," Physica Scripta 94, 044001 (2019); for the New Focus issue: Quantum Optics and Beyond- in honour of Wolfgang Schleich [download].
  

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• Yeong-Cherng Liang (梁永成), Department of Physics, National Cheng Kung University, Tainan
  [1] Chung-Yun Hsieh, Yeong-Cherng Liang, and RKL, "Quantum steerability: Characterization, quantification, superactivation, and unbounded amplification," Phys. Rev. A 94, 062120 (2016) [download].
  

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• Li-Yi Hsu(徐立義); Department of Physics, Chung Yuan Christian University, Taoyuan
  [1] Li-Yi Hsu, Ching-Yi Lai, You-Chia Chang, Chien-Ming Wu, and RKL, "Carrying an arbitrarily large amount of information using a single quantum particle," Phys. Rev. A 102, 022620 (2020); [download].
  

  ---

  
  
  
• Cheng-Ling Lee (李澄琳); Department of Physics, National United University, Miaoli
  [3] Cheng-Ling Lee, RKL, and Yee-Mou Kao, "Lagrange-multiplier-constrained optimization for designing narrowband dispersionless fiber Bragg gratings," Optical Engineering 47, 015005 (2008) [download].
  
  [2] Cheng-Ling Lee, RKL, and Yee-Mou Kao, "Synthesis of long-period fiber gratings with a Lagrange multiplier optimization method," Optics Comm. 281, 61 (2008) [download].
  
  [1] Cheng-Ling Lee, RKL, and Yee-Mou Kao, "Design of multichannel DWDM fiber Bragg grating filters by Lagrange multiplier constrained optimization," Optics Express 14, 11002 (2006) [download].
  

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• YuanYao Lin (林元堯); Department of Photonics, National Sun Yat-sen University, Kaohsiung
   More
  
  
• Jeng Yi Lee (李政誼); Department of Photonics, National Dong Hwa University, Hualien
   More
  
  

KAGRA Collaboration, Institute for Cosmic Ray Research (ICRR), KAGRA Observatory, The University of Tokyo, Japan

Matteo Leonardi; National Astronomical Observatory of Japan, Mitaka, Tokyo, Japan


[1] Yuhang Zhao, Naoki Aritomi, Eleonora Capocasa, Matteo Leonardi, Marc Eisenmann, Yuefan Guo, Eleonora Polini, Akihiro Tomura, Koji Arai, Yoichi Aso, Yao-Chin Huang, RKL, Harald Luck, Osamu Miyakawa, Pierre Prat, Ayaka Shoda, Matteo Tacca, Ryutaro Takahashi, Henning Vahlbruch, Marco Vardaro, Chien-Ming Wu, Matteo Barsuglia, and Raffaele Flaminio, "Frequency-dependent squeezed vacuum source for broadband quantum noise reduction in advanced gravitational-wave detectors," Phys. Rev. Lett. 124, 171101 (2020) [download];   Editors' Suggestion; Featured in Physics [download].

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Gang Wang (王鋼), School of Physical Science and Technology, Soochow University, Suzhou, China
[4] Yu-Han Chang, Nadia Daniela Rivera Torres, Santiago Figueroa Manrique, Raul A. Robles Robles, Vanna Chrismas Silalahi, Cen-Shawn Wu, Gang Wang, Giulia Marcucci, Laura Pilozzi, Claudio Conti, RKL, and Watson Kuo, "Probing topological protected transport in finite-sized Su-Schrieffer-Heeger chains," [arXiv: 2004.09282].

[3] Chun-Yan Lin, Giulia Marcucci, You-Lin Chuang, Gang Wang, Claudio Conti, and RKL, "Multidimensional topological strings by curved potentials: Simultaneous realization of mobility edge and topological protection," OSA Continuum 4, 315 (2021); [download].

[2] Hang Yu, En Guo Guan, Gang Wang, Jian Hua Jiang, Jun Hu, Jin Hui Wu, and RKL, "Synthesizing quantum spin Hall phase for ultracold atoms in bichromatic chiral optical ladders," Optics Express 28, 21072 (2020) [download];

[1] Hua Li Chen, Gang Wang, and RKL, "Nearly complete survival of an entangled biphoton through bound states in continuum in disordered photonic lattices," Optics Express 26, 33205 (2018) [download].

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Junde Wu (武俊德), School of Mathematical Sciences, Zhejiang University, Hangzhou, China
[6] Hai Wang, RKL, and Junde Wu, "Discrete-time modeling of quantum evolutions, the energy-time uncertainty relation and general extensions in the entangled history formalism," [arXiv: 1908.02935].

[5] Hai Wang, RKL, Manish Kumar Shukla, Indranil Chakrabarty, Shaoming Fei, and Junde Wu, "What are temporal correlations?," [arXiv: 1910.05694].

[4] Minyi Huang, RKL, Qing-hai Wang, Guo-Qiang Zhang, and Junde Wu, "Solvable dilation model of time-dependent PT-symmetric systems," Phys. Rev. A 105, 062205 (2022); [download].

[3] Minyi Huang, RKL, and Junde Wu, "Extracting the internal nonlocality from the dilated Hermiticity," Phys. Rev. A 104, 012202 (2021); [download].

[2] Minyi Huang, RKL, Lijian Zhang, Shao-Ming Fei, and Junde Wu, "Simulating broken PT-symmetric Hamiltonian systems by weak measurement," Phys. Rev. Lett. 123, 080404 (2019) [download].

[1] Minyi Huang, RKL, and Junde Wu, "Manifestation of Superposition and Coherence in PT-symmetry through the $\eta$-inner Product," J. Phys. A: Math. Theor. 51, 414004 (2018) [download].

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Lijian Zhang (張利劍) , College of Engineering and Applied Sciences, Nanjing University, Nanjing, China
[1]Minyi Huang, RKL, Lijian Zhang, Shao-Ming Fei, and Junde Wu, "Simulating broken PT-symmetric Hamiltonian systems by weak measurement," Phys. Rev. Lett. 123, 080404 (2019) [download].

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Minyi Huang (黃閔怡), Zhejiang University of Sciences and Technology, Hangzhou, China
[5] Minyi Huang, RKL, Qing-hai Wang, Guo-Qiang Zhang, and Junde Wu, "Solvable dilation model of time-dependent PT-symmetric systems," Phys. Rev. A 105, 062205 (2022); [download].

[4] Minyi Huang and RKL, "Internal nonlocality in generally dilated Hermiticity," Phys. Rev. A 105, 052210 (2022); [download].

[3] Minyi Huang, RKL, and Junde Wu, "Extracting the internal nonlocality from the dilated Hermiticity," Phys. Rev. A 104, 012202 (2021); [download].

[2] Minyi Huang, RKL, Lijian Zhang, Shao-Ming Fei, and Junde Wu, "Simulating broken PT-symmetric Hamiltonian systems by weak measurement," Phys. Rev. Lett. 123, 080404 (2019) [download].

[1] Minyi Huang, RKL, and Junde Wu, "Manifestation of Superposition and Coherence in PT-symmetry through the $\eta$-inner Product," J. Phys. A: Math. Theor. 51, 414004 (2018) [download].

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Shaoming Fei (費少明); School of Mathematical Sciences, Capital Normal University, Beijing, China,
[2] Hai Wang, RKL, Manish Kumar Shukla, Indranil Chakrabarty, Shaoming Fei , and Junde Wu, "What are temporal correlations?," [arXiv: 1910.05694].

[1] Minyi Huang, RKL, Lijian Zhang, Shaoming Fei, and Junde Wu, "Simulating broken PT-symmetric Hamiltonian systems by weak measurement," Phys. Rev. Lett. 123, 080404 (2019) [download].

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Wen-Xing Yang (楊文星), Yangtze University, Jingzhou, Hubei, China
 More

Ming Shen (申明), Shanghai University, Shanghai, China
 More

Jibing Liu (劉繼兵), Hubei Normal University, Hubei, China
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Qingyu Cai (蔡慶宇), Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan, China

Tai-Kai Ng (吳大琪), Department of Physics, Hong Kong University of Science and Technology, Hong Kong
[1] Soi-Chan Lei, Tai-Kai Ng, and RKL, "Photonic analogue of Josephson effect in a dual-species optical-lattice cavity," Optics Express 18, 14586 (2010) [download].

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Qing-hai Wang (王清海), Department of Physics, National University of Singapore, Singapore
[1] Minyi Huang, RKL, Qing-hai Wang, Guo-Qiang Zhang, and Junde Wu, "Solvable dilation model of time-dependent PT-symmetric systems," Phys. Rev. A 105, 062205 (2022); [download].

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Zia uddin, Department of Physics, COMSATS Institute of Information Technology, Islamabad, Pakistan
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Sajid Qamar, Department of Physics, COMSATS Institute of Information Technology, Islamabad, Pakistan
[6] Rahmatullah, Ziauddin, You-Lin Chuang, RKL, and Sajid Qamar, "Sub-microwave wavelength localization of Rydberg superatoms," J. Opt. Soc. Am. B 35, 2588 (2018) [download].

[5] Rahmatullah, You-Lin Chuang, RKL, and Sajid Qamar, "3D atom microscopy in the presence of Doppler shift," Laser Phys. Lett. 15, 035202 (2018) [download];

[4] Ziauddin, You-Lin Chuang, Sajid Qamar, and RKL, "Goos-Hanchen shift of partially coherent light fields in epsilon-near-zero metamaterials," Sci. Rep. 6, 26504 (2016) [download].

[3] Ziauddin, RKL, and Sajid Qamar, "Goos-Hanchen shifts of partially coherent light beams from a cavity with a four-level Raman gain medium," Opt. Comm. 374, 45 (2016) [download].

[2] Ziauddin, RKL, and Sajid Qamar, "Control of Goos-Hanchen shift via input probe field intensity," Opt. Comm. 379, 68 (2016) [download].

[1] Ziauddin, You-Lin Chuang, RKL, and Sajid Qamar, "Coherent control of the group velocity in a dielectric slab doped with duplicated two-level atoms," Laser Phys. 26, 015205 (2016) [download].

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Prasanta K. Panigrahi, Department of Physical Sciences, IISER Kolkata, India

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Utpal Roy; Indian Institute of Technology Patna, India
[1] Jayanta Bera, Barun Halder, Suranjana Ghosh, RKL, Utpal Roy, "Quantum Sensing with Sub-Planck Structures for the Dynamics of Bose-Einstein Condensate in Presence of Engineered Potential Barriers inside a Harmonic Trap," Phys. Lett. A 453, 128484 (2022); [download].

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Suranjana Ghosh; Indian Institute of Science Education and Research Kolkata, India
[1] Jayanta Bera, Suranjana Ghosh, RKL, and Utpal Roy, "Theoretical scheme for quantum sensing in trapped ultracold atoms," submitted for publication (Sep. 2020).

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Indranil Chakrabarty; Center for Security Theory and Algorithmic Research, International Institute of Information Technology, Gachibowli, Hyderabad, India
[1] Hai Wang, RKL, Manish Kumar Shukla, Indranil Chakrabarty, Shaoming Fei, and Junde Wu, "What are temporal correlations?," [arXiv: 1910.05694].

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Gershon Kurizki; Department of Chemical Physics, Weizmann Institute of Science, Rehovot, Israel
[1] Chun-Yan Lin, Jen-Hsu Chang, Gershon Kurizki, and RKL, "Solitons supported by intensity-dependent dispersion," Opt. Lett. 45, 1471 (2020) [download].

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Aharon J. Agranat; Applied Physics Department, Hebrew University of Jerusalem, Israel
[1] Giulia Marcucci, Davide Pierangeli, Aharon J. Agranat, RKL, Eugenio DelRe, and Claudio Conti, "Topological Control of Extreme Waves," Nature Comm. 10, 5090 (2019) [download]; Highlight by Nature Phys. 15, 1210 (2019): Tamed by Topology [download].

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Boris A. Malomed; Department of Physical Electronics, School of Electrical Engineering, Faculty of Engineering, Tel Aviv University, Israel
[8] Xing-You Chen, You-Lin Chuang, Chun-Yan Lin, Chien-Ming Wu, Yongyao Li, Boris A. Malomed, and RKL, "Magic tilt angle for stabilizing two-dimensional solitons by dipole-dipole interactions," Phys. Rev. A 96, 043631 (2017) [download].

[7] Kuan-Hsien Kuo, YuanYao Lin, RKL, and Boris A. Malomed, "Gap solitons under competing local and nonlocal nonlinearities," Phys. Rev. A 83, 053838 (2011) [download].

[6] YuanYao Lin, Chandroth P. Jisha, Ching-Jen Jeng, RKL, and Boris A. Malomed , "Gap solitons in optical lattices embedded into nonlocal media," Phys. Rev. A 81, 063803 (2010) [download].

[5] YuanYao Lin, RKL, and Boris A. Malomed, "Bragg solitons in nonlocal nonlinear media," Phys. Rev. A 80, 013838 (2009) [download].

[4] RKL, Yinchieh Lai, and Boris A. Malomed, "Photon-number fluctuation and correlation of bound soliton pairs in mode-locked fiber lasers," Opt. Lett. 34, 3084 (2005) [download].

[3] RKL, Yinchieh Lai, and Boris A. Malomed, "Generation of photon-number entangled soliton pairs through interactions," Phys. Rev. A 71, 013816 (2005); also selected in Virtual Journal of Quantum Information 5, Issue 2 (2005) [download].

[2] RKL, Yinchieh Lai, and Boris A. Malomed, "Quantum correlations in bound-soliton pairs and trains in fiber lasers," Phys. Rev. A 70, 063817 (2004); also selected in Virtual Journal of Quantum Information 5, Issue 1 (2005) [download].

[1] RKL and Yinchieh Lai, and Boris A. Malomed, "Quantum Fluctuations around Bistable Solitons in the cubic-quintic nonlinear Schrodinger equation," J. Opt. B: Quantum and Semiclassical Optics 6, 367 (2004) [download].

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