Article
Materials Science, Multidisciplinary
Jingjing Jin, Wei Han, Huifang Zhao, Wenyuan Liu
Summary: This study investigates the Moire superlattice structures generated by the interplay between vortex lattice and optical lattice in two-component Bose-Einstein condensates. The possible superlattice patterns under different twist angles are studied, as well as the relative shift of the Moire superlattices in two components of the condensates.
RESULTS IN PHYSICS
(2022)
Article
Physics, Multidisciplinary
P. T. Song
Summary: We study the universal quantum effect of two-component dilute Bose gases confined between two parallel slabs, considering finite-size, boundary condition, and mixture effects. A first-order phase transition phenomenon is theoretically predicted based on the energy density of the system.
EUROPEAN PHYSICAL JOURNAL PLUS
(2022)
Article
Mathematics, Interdisciplinary Applications
Mikhail N. Smolyakov
Summary: In this paper, quantization of a weakly nonideal Bose gas at zero temperature is performed along the lines of the well-known Bogolyubov approach. By introducing nonoscillation modes and calculating nonlinear corrections, the analysis successfully recovers canonical commutation relations and solves the issue of nonconserved particle number at least in the case of free quasi-particles.
CHAOS SOLITONS & FRACTALS
(2021)
Article
Physics, Multidisciplinary
E. Ghasemian, M. K. Tavassoly
Summary: This paper introduces a generalized f-deformed Dicke model to describe the dynamics of an atomic Bose-Einstein condensate under collisional interactions and Stark effect. By solving the corresponding Schrodinger equation, the dynamics of the system under different physical situations are investigated, showing that the system evolution can be controlled by tuning the interaction parameters. The general behavior of the system, such as energy transfer, non-classical properties, and entanglement, is analyzed numerically, with results indicating the impact of different initial states on the system dynamics.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2021)
Article
Materials Science, Multidisciplinary
Qingbo Wang, Jinguo Hu, Xianghua Su, Linghua Wen
Summary: The study explores the dynamics of rotating pseudo-spin-1/2 Bose-Einstein condensates with Rashba spin-orbit coupling in a quasicrystalline optical lattice. It was observed that the system evolves from an initial heliciform-stripe phase into a final visible vortex necklace with a giant vortex and a hidden vortex necklace. The corresponding spin texture undergoes a transition from a meron-antimeron pair to a half-antiskyrmion necklace during the dynamic evolution process.
RESULTS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
Guoquan Yang, Siyu Xie, Yan Zhao, Jingjing Jin, Suying Zhang
Summary: We studied the dynamics of ring dark solitons in a two-dimensional dipolar Bose-Einstein condensate and found that the effect of dipolar interaction on the soliton dynamics is different from that in a non-dipolar condensate. The dipolar interaction can induce collapse of shallow ring dark solitons and the formation of vortex-antivortex pairs. When the dipolar atoms are oriented non-vertically to the condensate, the solitons shrink to an elliptical configuration and decay into lump solitons or vortex-antivortex pairs, with phenomena such as vortex recombination, annihilation, oblique collisions, and catching up.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2023)
Article
Physics, Multidisciplinary
Xueping Ren, Xiaolin Li, Zhikun Zhou, Xiaohuan Wan, Hongjuan Meng, Yushan Zhou, Juan Zhang, Xiaobei Fan, Jing Wang, Yuren Shi
Summary: The dynamics of spin-1 Bose-Einstein condensate with antiferromagnetic spin interaction in the presence of a moving obstacle potential was studied numerically. Various coreless vortex patterns were observed in the system, with the distance ratios between vortex rows and pairs falling below the stability criterion for classical fluids. The angular velocity of the vortex street and the distance between vortices in a pair exhibited periodic oscillations, while the density of vortex-like structures produced weak drag forces.
PHYSICA A-STATISTICAL MECHANICS AND ITS APPLICATIONS
(2022)
Article
Physics, Multidisciplinary
Nguyen Van Thu
Summary: By analytically solving the nonlinear gap and Schwinger-Dyson equations, the non-condensate fraction of a weakly interacting Bose-Einstein condensate (BEC) confined between two parallel plates at zero temperature is investigated within the improved Hartree-Fock approximation. It is proved that the finite-size effect increases the non-condensate fraction compared with the one of the same homogeneous BEC. Our result also shows that the non-condensate fraction can be expressed as a sum of two terms: the first term corresponds to the non-condensate fraction of the homogeneous dilute BEC and the other appears because of the confinement. Both terms are universal. A comparison with the experimental data is made.
Article
Optics
A. D. Garcia-Orozco, L. Madeira, M. A. Moreno-Armijos, A. R. Fritsch, P. E. S. Tavares, P. C. M. Castilho, A. Cidrim, G. Roati, V. S. Bagnato
Summary: We studied the emergence of universal scaling in the time-evolving momentum distribution of a harmonically trapped three-dimensional Bose-Einstein condensate, which was parametrically driven to a turbulent state. We found that the out-of-equilibrium dynamics post excitation can be described by a single function due to nearby nonthermal fixed points. The observed behavior connects the dynamics of a quantum turbulent state to several far-from-equilibrium phenomena.
Article
Multidisciplinary Sciences
Mengjie Wei, Wouter Verstraelen, Konstantinos Orfanakis, Arvydas Ruseckas, Timothy C. H. Liew, Ifor D. W. Samuel, Graham A. Turnbull, Hamid Ohadi
Summary: The authors demonstrate the on-the-fly reconfigurable optical trapping of organic polariton condensates, which are delocalized over a macroscopic distance from the excitation region. This study holds great potential for future research on polaritonic lattice physics.
NATURE COMMUNICATIONS
(2022)
Article
Materials Science, Multidisciplinary
Yu Zhang, Xianghua Su, Hanlin Chen, Yeyun Hong, Jinghong Li, Linghua Wen
Summary: In this study, we investigate the ground-state phases and spin textures of rotating binary dipolar Bose-Einstein condensates with Lee-Huang-Yang (LHY) correction and Raman-induced spin-orbit coupling (SOC). The results show that the system exhibits rich and exotic quantum phases, as well as complex spin structures under different parameter conditions.
RESULTS IN PHYSICS
(2023)
Article
Materials Science, Multidisciplinary
Wen-Kai Bai, Jian-Chong Xing, Tao Yang, Wen-Li Yang, Wu-Ming Liu
Summary: In this study, the nonlinear dynamics of a three-dimensional Bose-Einstein condensate excited by a vortex ring phase imprinting were investigated. The amplitude and frequency of the center-of-mass oscillation of the condensate were found to be influenced by the initial radius of the vortex ring, nonlinear inter-atomic interactions, trap aspect ratio, and Kelvin wave perturbations. The parity of the wave number of Kelvin perturbations played a significant role in determining the mode of the center-of-mass oscillation of the condensate.
RESULTS IN PHYSICS
(2021)
Article
Physics, Multidisciplinary
P. T. Song
Summary: This study investigates the quantum fluctuation of a weakly interacting Bose gas confined between two parallel plates at zero temperature within the two-loop approximation of the Cornwall-Jackiw-Tomboulis (CJT) effective action approach. The effects of finite size and boundary conditions on the excitation atomic density, energy density, chemical potential, and sound speed are determined, including the prediction of a first-order phase transition phenomenon.
Article
Mathematics, Interdisciplinary Applications
Mikhail N. Smolyakov
Summary: The present paper continues the discussion of the canonical quantization of a weakly nonideal Bose gas at zero temperature within the framework of the Bogolyubov approach. In contrast to a previous paper on this subject, the general form of the two-body interaction potential is considered. It is shown that in this case, considering the first nonlinear correction also automatically leads to particle number conservation without any additional assumptions or modification of the resulting effective Hamiltonian.
CHAOS SOLITONS & FRACTALS
(2023)
Article
Quantum Science & Technology
N. Dupont, G. Chatelain, L. Gabardos, M. Arnal, J. Billy, B. Peaudecerf, D. Sugny, D. Guery-Odelin
Summary: This study presents an efficient design of quantum optimal-control protocols for manipulating the motional states of atomic Bose-Einstein condensate in a one-dimensional optical lattice. By varying the lattice position, a wide variety of targets can be reached, including single or multiple quantized momentum states with full control on the relative phase between different momentum components.
Article
Physics, Mathematical
Whei Yeap Suen, Thomas J. Elliott, Jayne Thompson, Andrew J. P. Garner, John R. Mahoney, Vlatko Vedral, Mile Gu
Summary: This study investigates the structural complexity of quantum many-body systems using tools from complexity science. By examining the one-dimensional quantum Ising and Bose-Hubbard models, the researchers find that different information-theoretic measures of complexity can identify different features of these models.
JOURNAL OF STATISTICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Jie Wang, Zhao Liu
Summary: This paper proposes models of twisted multilayer graphene that have exactly flat Bloch bands with arbitrary Chern numbers and ideal band geometries. The ideal band geometries and high Chern numbers of the flatbands imply the possibility of hosting exotic fractional Chern insulators, which have unique properties under short-range interactions.
PHYSICAL REVIEW LETTERS
(2022)
Article
Physics, Multidisciplinary
Ajit C. Balram, Zhao Liu, Andrey Gromov, Zlatko Papic
Summary: This paper argues that some high-energy states in the fractional quantum Hall (FQH) spectra require a different description based on parton quasiparticles, through numerical simulations and effective field theory. The study shows that Jain states at certain filling factors support two kinds of collective modes, including a high-energy collective mode interpreted as the Girvin-MacDonald-Platzman (GMP) mode of partons. Observable signatures of the parton mode in dynamics following a geometric quench are elucidated. A microscopic wave function for the parton mode is constructed and its variational energy is shown to agree with exact diagonalization. The field theory of the Jain states is derived using the parton construction, and the previously proposed effective theories are shown to be consistent with their approach. These results suggest that partons are real quasiparticles, observable only at sufficiently high energies, in a manner reminiscent of quarks.
Review
Physics, Multidisciplinary
Kai Xu, Heng Fan
Summary: This article reviews the research progress on noisy multiqubit quantum computation and quantum simulation, focusing on multiqubit state generations, quantum computational advantage, and simulating physics of quantum many-body systems. The perspectives of near term noisy intermediate-quantum processors are also discussed.
Article
Chemistry, Physical
Kaixuan Huang, Xiaoxia Cai, Hao Li, Zi-Yong Ge, Ruijuan Hou, Hekang Li, Tong Liu, Yunhao Shi, Chitong Chen, Dongning Zheng, Kai Xu, Zhi-Bo Liu, Zhendong Li, Heng Fan, Wei-Hai Fang
Summary: Simulating the response properties of molecules is essential for materials design, but it is a challenging task for classical computers. In this study, a practical variational quantum response (VQR) algorithm is introduced to simulate response properties without the need for deep quantum circuits. By using this algorithm on a superconducting quantum processor, the first simulation of linear response properties of molecules, including dynamic polarizabilities and absorption spectra, is reported. The results suggest that near-term quantum hardware can achieve important dynamical properties with suitable error mitigation techniques.
JOURNAL OF PHYSICAL CHEMISTRY LETTERS
(2022)
Article
Physics, Multidisciplinary
Chi-Tong Chen, Yun-Hao Shi, Zhongcheng Xiang, Zheng-An Wang, Tian-Ming Li, Hao-Yu Sun, Tian-Shen He, Xiaohui Song, Shiping Zhao, Dongning Zheng, Kai Xu, Heng Fan
Summary: In this study, we present an online public quantum computation platform called ScQ, which utilizes a 1D array of a 10-qubit superconducting processor. The platform allows for single-qubit rotations and controlled-NOT gates between neighboring qubits. We demonstrate the online preparation and verification of Greenberger-Horne-Zeilinger states of up to 10 qubits using ScQ, and provide details on the graphical user interface and quantum assembly language methods. We also present the performance of the quantum computation platform, including the fidelities of logic gates and superconducting device details.
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Editorial Material
Physics, Multidisciplinary
Ming-Liang Hu, Heng Fan
SCIENCE CHINA-PHYSICS MECHANICS & ASTRONOMY
(2022)
Article
Multidisciplinary Sciences
Tong Liu, Shang Liu, Hekang Li, Hao Li, Kaixuan Huang, Zhongcheng Xiang, Xiaohui Song, Kai Xu, Dongning Zheng, Heng Fan
Summary: The authors used a fully connected superconducting quantum processor with up to 15 qubits to confirm the interesting phenomenology of entanglement phase diagrams of Haar-measure random states, including entanglement phase transitions. Random quantum states are powerful tools in various scientific fields, and it has been theoretically predicted that entanglement transitions can occur for different partitions of multipartite random quantum states. This experimental study demonstrates entanglement transitions using negativity as the witness in a fully connected superconducting processor.
NATURE COMMUNICATIONS
(2023)
Article
Physics, Multidisciplinary
Wei-Bin Yan, Ying-Jie Zhang, Zhong-Xiao Man, Heng Fan, Yun-Jie Xia
Summary: A novel quantum-optics scheme for supervised learning is proposed based on the excellent control of single photons realized by atom-photon-chiral couplings. The single-photon rotating and phase-shift operations, which can be controlled by another single photon, are achieved by proper atom-photon-chiral couplings. Moreover, an algorithm is implemented to perform the supervised learning tasks by integrating the realized gates and adjusting the gate parameters.
ANNALEN DER PHYSIK
(2023)
Article
Physics, Multidisciplinary
Yun-Hao Shi, Yu Liu, Yu-Ran Zhang, Zhongcheng Xiang, Kaixuan Huang, Tao Liu, Yong-Yi Wang, Jia-Chi Zhang, Cheng-Lin Deng, Gui-Han Liang, Zheng-Yang Mei, Hao Li, Tian-Ming Li, Wei-Guo Ma, Hao-Tian Liu, Chi-Tong Chen, Tong Liu, Ye Tian, Xiaohui Song, Kai Xu, Dongning Zheng, Franco Nori, Heng Fan
Summary: This study develops a one-dimensional 43-qubit superconducting quantum processor called Chuang-tzu, which is used to simulate and characterize emergent topological states. The quantum processor is capable of capturing important topological features of quantum systems, providing a new method for studying quantum topological systems in the NISQ era.
PHYSICAL REVIEW LETTERS
(2023)
Article
Quantum Science & Technology
Wen Ning, Ri-Hua Zheng, Yan Xia, Kai Xu, Hekang Li, Dongning Zheng, Heng Fan, Fan Wu, Zhen-Biao Yang, Shi-Biao Zheng
Summary: This study reveals a more fundamental and universal interference behavior beyond Zitterbewegung in phase space for Dirac particles, which is confirmed by both numerical simulation and on-chip experiment. This discovery is of fundamental importance in science and holds potential applications in quantum technology.
NPJ QUANTUM INFORMATION
(2023)
Article
Optics
Li -Hang Ren, Yun-Hao Shi, Jin-Jun Chen, Heng Fan
Summary: We propose generalized state-dependent entropic uncertainty relations, obtaining the optimal lower bound by considering different measurement sequences. We apply this relation to detect entanglement, giving experimentally accessible lower bounds on both bipartite and tripartite entanglements. We demonstrate the detection of multipartite entanglement up to ten qubits using the QUAFU cloud quantum computation platform.
Article
Optics
Kishor Bharti, Tobias Haug, Vlatko Vedral, Leong-Chuan Kwek
Summary: Semidefinite programs are widely used convex optimization problems with applications in various fields. Noisy intermediate-scale quantum algorithms aim to efficiently use current quantum hardware. We propose a NISQ algorithm for solving SDPs and provide numerical evidence of its improvements in estimating ground-state energies.
Article
Optics
Aditya Iyer, Eduardo O. Dias, Vlatko Vedral
Summary: By representing events as joint states of detector-timer couples interacting with systems, this study recovers the tensor product structure commonly used to describe spatially separated systems in the context of time events. The superposition principle is extended to the moment of occurrence of events. Quantum signatures of causality are outlined through coherence in the detector state and correlation functions of time operators. Additionally, quantum information theoretic measures commonly used to characterize spatially separated systems are expanded to events in spacetime.
Article
Astronomy & Astrophysics
Gowtham Amirthya Neppoleon, Aditya Iyer, Vlatko Vedral, Yi Wang
Summary: This study examines the superposition of primordial massive particles and calculates the associated decoherence time scale in the radiation dominated Universe. The findings demonstrate that lighter primordial particles can persist in a pure quantum state, while heavier particles have limited position uncertainties due to background photons. Furthermore, the study discusses three potential observational signatures that may arise from the quantum superposition of primordial particles, such as interference effects, transition lines in the gravitational wave spectrum, and evidence of quantum entanglement.
