Article
Quantum Science & Technology
Eun Oh, Xuanying Lai, Jianming Wen, Shengwang Du
Summary: The promise of universal quantum computing requires scalable control interactions between single or multiple qubits. Current leading candidate platforms for quantum computing, superconducting circuits, trapped ions, and neutral atom arrays, suffer from strong interaction with environmental and control noises resulting in qubit decoherence. Photons, on the other hand, have advantages of being well decoupled from the environment and having high speed and timing capabilities. This article proposes a universal distributed quantum computing scheme based on photons and atomic-ensemble-based quantum memories, showcasing the potential of a photon-atom network hybrid approach.
ADVANCED QUANTUM TECHNOLOGIES
(2023)
Article
Physics, Multidisciplinary
Dripto M. Debroy, Laird Egan, Crystal Noel, Andrew Risinger, Daiwei Zhu, Debopriyo Biswas, Marko Cetina, Chris Monroe, Kenneth R. Brown
Summary: We study variants of Shor's code that can handle single-axis correlated idling errors, showing a factor of 3.78 +/- 1.20 improvement of the logical T2* in a distance-3 logical qubit implemented on a trapped-ion quantum computer. Our Shor-code variants are fully robust to identical and independent coherent idling noise, forming decoherence-free subspaces.
PHYSICAL REVIEW LETTERS
(2021)
Article
Physics, Multidisciplinary
Caterina Vigliar, Stefano Paesani, Yunhong Ding, Jeremy C. Adcock, Jianwei Wang, Sam Morley-Short, Davide Bacco, Leif K. Oxenlowe, Mark G. Thompson, John G. Rarity, Anthony Laing
Summary: Error-protection schemes can increase the success rate of quantum algorithms. General-purpose quantum computers can entangle noisy physical qubits to protect against errors. Measurement-based quantum computing architectures are the most viable approach for constructing an all-photonic quantum computer.
Article
Chemistry, Multidisciplinary
Samuel Lenz, Dennis Koenig, David Hunger, Joris van Slageren
Summary: Although quantum computing has made great progress recently, the development of quantum memories has not kept pace. Current quantum memories require cryogenic temperatures and expensive peripheral hardware, but new research shows that ensembles of weakly coupled molecular spins can operate at room temperature and be used to store microwave pulses.
ADVANCED MATERIALS
(2021)
Review
Quantum Science & Technology
Zhihui Yan, Liang Wu, Xiaojun Jia, Changde Xie, Kunchi Peng
Summary: A quantum network consists of quantum channels and quantum nodes, with the interaction between non-classical optical modes and quantum nodes, and quantum entanglement among multiple distant quantum nodes being essential building blocks. The practical applications of quantum network require multipartite non-classical states of optical modes that can directly interact with atomic ensembles, and a key goal is to unconditionally generate and store multipartite entangled states in atomic ensembles. Recent developments include creating multipartite continuous-variable polarization entangled optical modes and constructing a scalable quantum network with deterministic entanglement among multiple quantum memories.
ADVANCED QUANTUM TECHNOLOGIES
(2021)
Article
Multidisciplinary Sciences
Nadja Doerig, Rosa J. Seinsche, Marius Moisa, Erich Seifritz, Christian C. Ruff, Birgit Kleim
Summary: Reappraisal of negative memories is crucial for mental health, and tDCS may enhance these effects, potentially optimizing treatment approaches for psychiatric disorders.
SCIENTIFIC REPORTS
(2021)
Article
Mathematics, Applied
Mounir Afilal, Baowei Feng, Abdelaziz Soufyane
Summary: This paper investigates the decay properties of suspension bridge with memories in one dimension by using the energy method to build delicate Lyapunov functionals that give the desired results.
MATHEMATICAL METHODS IN THE APPLIED SCIENCES
(2021)
Review
Physics, Multidisciplinary
Mucheng Guo, Shuping Liu, Weiye Sun, Miaomiao Ren, Fudong Wang, Manjin Zhong
Summary: Rare-earth doped crystals show great potential for developing ensemble-based solid state quantum memories for applications in remote quantum communication and fast quantum processing. Recent achievements in quantum storage and exciting applications have been demonstrated, but significant technical challenges remain. This paper outlines the current status of rare-earth-based quantum memories development, focusing on different storage protocols and experimental demonstrations, and analyzes the challenges while providing feasible solutions.
FRONTIERS OF PHYSICS
(2023)
Article
Chemistry, Multidisciplinary
Randall B. Shirts, John S. Welch
Summary: This study examines the time-dependent numerical solutions of the Schrodinger equation in quantum systems perturbed by a sinusoidal field and illuminates the role of interstate phase differences in multiphoton absorption. Population inversion does not occur in the presence of non-zero detuning due to the drift of the exciting field.
Review
Physics, Fluids & Plasmas
M. D. Forlevesi, R. Egydio de Carvalho, Emanuel F. de Lima
Summary: This article investigates the nonlinear dynamics of a diatomic polar molecule under a linearly polarized laser field. The molecule's dipole is coupled with a time-dependent electric field, resulting in a bound energy region and a free-energy region. The system has two and a half degrees of freedom due to the nonalignment between the dipole axis and the laser direction, as well as the time dependence of the external field. Instead of using the Poincare surface-of-section technique, the Lagrangian descriptor associated with escape times is proposed to analyze the system dynamics.
Article
Telecommunications
Ankit Khandelwal, Stephen DiAdamo
Summary: To reduce noise in quantum channels, calibration is used to minimize error by adjusting the devices. A simple protocol is proposed to hide the calibration states and cost function from the receiver while allowing efficient calibration, thus increasing the protocol's privacy. Numerical results demonstrate the effectiveness of the protocol under different channel noise parameters and communication scenarios.
IEEE COMMUNICATIONS LETTERS
(2023)
Article
Telecommunications
Ankit Khandelwal, Stephen DiAdamo
Summary: To mitigate noise in quantum channels, calibration is used to minimize error by transmitting pre-agreed calibration states. However, an untrusted party could gain knowledge of the protocol by observing the calibration states and cost function. In this study, we propose a protocol that hides the calibration states and cost function from the receiver while still allowing for efficient calibration, thus increasing protocol privacy.
IEEE COMMUNICATIONS LETTERS
(2023)
Article
Astronomy & Astrophysics
Teng Zhang, Denis Martynov, Haixing Miao, Stefan Danilishin
Summary: This study introduces the sloshing-Sagnac interferometer topology to overcome the limitations caused by optical loss in current gravitational-wave detectors, improving sensitivity and signal-to-noise ratio.
Article
Chemistry, Physical
M. H. Rayment, S. D. Hogan
Summary: In this study, nitric oxide molecules were excited to long-lived Rydberg-Stark states in pulsed supersonic beams and successfully guided, decelerated, and trapped. The measurement of decay time constants revealed different decay rates for molecules in different Rydberg-Stark states.
JOURNAL OF CHEMICAL PHYSICS
(2023)
Article
Optics
Xin-Lei Hei, Xing-Liang Dong, Jia-Qiang Chen, Cai-Peng Shen, Yi-Fan Qiao, Peng-Bo Li
Summary: This research presents a simple technique to strongly couple a single solid-state spin to microwave photons in a superconducting coplanar waveguide cavity by using a magnetic microsphere. Strong coupling at the single spin level is achieved through virtual magnonic excitations of a nearby micromagnet. The spin-photon coupling strength is significantly enhanced, making it applicable in quantum information processing with strongly coupled solid-state spin-photonic systems.
Article
Optics
S. Sempere-Llagostera, G. S. Thekkadath, R. B. Patel, W. S. Kolthammer, I. A. Walmsley
Summary: In this study, we use the photon-number resolving capabilities of commercial superconducting nanowire single-photon detectors to improve the quality of single photons generated through nonlinear processes. Our results demonstrate the feasibility of enhancing the quality of heralded single-photon sources using readily available technology.
Article
Optics
Chong Sheng, Yao Wang, Yijun Chang, Huiming Wang, Yongheng Lu, Yingyue Yang, Shining Zhu, Xianmin Jin, Hui Liu
Summary: Topology has been widely used in various branches of physics, and topological defects in cosmology can be simulated to achieve bound vortex light on optical chips.
LIGHT-SCIENCE & APPLICATIONS
(2022)
Article
Optics
Chao-Ni Zhang, Hang Li, Jian-Peng Dou, Feng Lu, Hong-Zhe Yang, Xiao-Ling Pang, Xian-Min Jin
Summary: In this study, Hong-Ou-Mandel interference between single photons from two independent room-temperature quantum memories was successfully demonstrated. The interference rate was enhanced by increasing the photon rate and coordinating the quantum memories. The visibility of quantum interference reached 75.0%, surpassing the classical limit of 50%. These results are significant for the realization of large-scale quantum networks at ambient conditions.
PHOTONICS RESEARCH
(2022)
Article
Physics, Multidisciplinary
Ze-Kun Jiang, Ruo-Jing Ren, Yi-Jun Chang, Wen-Hao Zhou, Yong-Heng Lu, Xiao-Wei Wang, Li Wang, Chang -Shun Wang, Alexander S. Solntsev, Xian-Min Jin
Summary: We report the observation of dynamic localization for quantum-correlated biphotons, including both the generation and propagation aspects. Our experimental results demonstrate the effectiveness of various dynamic modulation parameters in protecting quantum states without introducing complex topologies.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Applied
Wen-Hao Zhou, Jun Gao, Zhi-Qiang Jiao, Xiao-Wei Wang, Ruo-Jing Ren, Xiao-Ling Pang, Lu-Feng Qiao, Chao-Ni Zhang, Tian-Huai Yang, Xian-Min Jin
Summary: This study introduces a timestamp boson sampling scheme that effectively reduces execution time, accelerating the sampling process and can be widely applied in multiphoton experiments at low-sampling rate.
APPLIED PHYSICS REVIEWS
(2022)
Article
Nanoscience & Nanotechnology
Zhen Feng, Bing-Hong Wu, Hao Tang, Lu-Feng Qiao, Xiao-Wei Wang, Xiao-Yun Xu, Zhi-Qiang Jiao, Jun Gao, Xian-Min Jin
Summary: This article introduces the mapping of the percolation model onto a photonic chip using femtosecond laser direct writing techniques, and demonstrates the existence of quantum percolation through experiments. The results show that in the laser-written photonic lattices, the quantum percolation threshold is larger than the classical counterpart, and a transition from ballistic to diffusive propagation is observed. These findings deepen our understanding of the relationship among materials, quantum transport, geometric quenching, disorder, and localization, and inspire applications for quantum technologies.
Article
Optics
Shi-Bao Wu, Zhan-Ming LI, Jun Gao, Heng Zhou, Chang-Shun Wang, Xian-Min Jin
Summary: Quantum correlation, an intrinsic property of quantum mechanics, has been widely used in testing physical principles and exploring quantum-enhanced technologies. This study demonstrates the classification of quantum correlation using deep learning in a quantum imaging scheme, addressing the challenge of high levels of loss and noise.
Article
Nanoscience & Nanotechnology
Yong-Heng Lu, Yi-Jun Chang, Yao Wang, Ying-Yue Yang, Tian-Huai Yang, Wen-Hao Zhou, Xiao-Wei Wang, Jun Gao, Hao Tang, Hang Zheng, Xian-Min Jin
Summary: Quantum transport is crucial for understanding the evolution of particle states in nature. This study proposes and experimentally demonstrates a novel multiregister transport with controllable interaction on a photonic chip, achieving effective photon transfer in the same subspace without crosstalk and preserving quantum correlation of photon states.
Article
Physics, Multidisciplinary
Xiao-Wei Wang, Wen-Hao Zhou, Yu-Xuan Fu, Jun Gao, Yong-Heng Lu, Yi-Jun Chang, Lu-Feng Qiao, Ruo-Jing Ren, Ze-Kun Jiang, Zhi-Qiang Jiao, Georgios M. Nikolopoulos, Xian-Min Jin
Summary: Through experiments, we demonstrate that the implementation of a cryptographic one-way function based on coarse-grained boson sampling in a photonic boson-sampling machine requires a moderate sample size, much smaller than predicted by the Chernoff bound. Nonboson samplers cannot generate the same output for numbers of photons n >= 3 and bins d similar to poly(m, n). Our study is the first experimental exploration of the potential applications of boson sampling in cryptography and paves the way for further research in this direction.
PHYSICAL REVIEW LETTERS
(2023)
Article
Nanoscience & Nanotechnology
Xiao-Yun Xu, Xian-Min Jin
Summary: With the decline of Moore's law, new computing architectures are emerging to address the challenges of intractable computation and artificial intelligence. Photonic computing, which harnesses the unique properties of photons, such as high speed and robustness, is a promising candidate. Integrated photonics has also made advancements in scalability and stability. Additionally, the incorporation of quantum technology could revolutionize photonic computing by leveraging single photons. This perspective highlights the advances and potential of integrated photonic platforms in constructing non-von Neumann computing architectures and discusses the challenges and opportunities they present in solving complex problems beyond traditional computers and in machine learning.
Article
Physics, Applied
S. E. Thomas, S. Sagona-Stophel, Z. Schofield, I. A. Walmsley, P. M. Ledingham
Summary: This paper reports a telecommunications wavelength- and bandwidth-compatible quantum memory, which enables efficient storage and on-demand retrieval of quantum optical states. It is an essential technology for future terrestrial-based quantum optical networking. The memory demonstrates a total internal efficiency of 20.90(1)% and a Doppler-limited storage time of 1.10(2) ns using the Off-Resonant Cascaded Absorption protocol in hot 87Rb vapor.
PHYSICAL REVIEW APPLIED
(2023)
Article
Multidisciplinary Sciences
F. H. B. Somhorst, R. van der Meer, M. Correa Anguita, R. Schadow, H. J. Snijders, M. de Goede, B. Kassenberg, P. Venderbosch, C. Taballione, J. P. Epping, H. H. van den Vlekkert, J. Timmerhuis, J. F. F. Bulmer, J. Lugani, I. A. Walmsley, P. W. H. Pinkse, J. Eisert, N. Walk, J. J. Renema
Summary: This study demonstrates that in a unitarily evolving system, single-mode measurements can converge to a thermal state using photons in an integrated optical interferometer. The resolution to the paradox between unitary evolution and the second law of thermodynamics is the recognition that the global unitary evolution of a multi-partite quantum state causes local subsystems to evolve towards maximum-entropy states. The experiment utilizes a programmable integrated quantum photonic processor to manipulate quantum states and shows the potential of photonic devices for simulating non-Gaussian states.
NATURE COMMUNICATIONS
(2023)
Article
Quantum Science & Technology
Xiao-Ling Pang, Chao-Ni Zhang, Jian-Peng Dou, Hang Li, Tian-Huai Yang, Xian-Min Jin
Summary: This study reports the creation of quantum entanglement between two different room-temperature quantum memories, which is significant for the fundamental research of quantum mechanics and the applications of quantum information technologies.
NPJ QUANTUM INFORMATION
(2023)
Proceedings Paper
Instruments & Instrumentation
Georg Enzian, Lars Freisem, John J. Price, Andreas O. Svela, Jack Clarke, Magdalena Szczykulska, Joshua Nunn, Ian Walmsley, Jonathan Silver, Leonardo Del Bino, Shuangyou Zhang, Pascal Del'Haye, Biveen Shajilal, Jiri Janousek, Ben C. Buchler, Ping Koy Lam, Michael R. Vanner
Summary: Research on backward Brillouin scattering in whispering-gallery-mode micro-resonators provides a promising avenue for both classical and quantum optomechanics applications. Our team, in collaboration with others, is utilizing this regime to prepare non-Gaussian motional states of the acoustic field. Recent experimental results include Brillouin optomechanical strong coupling, manipulation of thermal states by adding or subtracting single phonons, and phase-space tomography of non-Gaussian states generated by subtracting single or multiple phonons.
OPTICAL AND QUANTUM SENSING AND PRECISION METROLOGY II
(2022)
Article
Quantum Science & Technology
G. S. Thekkadath, S. Sempere-Llagostera, B. A. Bell, R. B. Patel, M. S. Kim, I. A. Walmsley
Summary: This paper presents a GBS machine that achieves displacement by injecting a laser beam and a two-mode squeezed vacuum state. The study shows that the machine has the ability to reconstruct multimode Gaussian state and reduce computational complexity.