Article
Physics, Multidisciplinary
Juan-juan Qi, Dun Zhao, Wu-Ming Liu
Summary: We analytically investigate the effects of spin-orbit coupling (SOC) on soliton collisions in spin-1 Bose-Einstein condensates (BECs). By using the non-standard Hirota's bilinear method, we derive exact soliton solutions for a 1D spin-orbit coupled spin-1 BEC, revealing how SOC can manipulate the dynamics of solitons in spinor BECs. We discuss in detail the soliton collisions of different types under SOC, including ferromagnetic-polar, ferromagnetic-ferromagnetic, and polar-polar collisions. Comparisons between systems with and without SOC show a remarkable phenomenon: SOC can cause the splitting of a soliton.
JOURNAL OF PHYSICS A-MATHEMATICAL AND THEORETICAL
(2023)
Article
Optics
Jing Li, E. Ya Sherman, Andreas Ruschhaupt
Summary: This paper explores the potential of a spin-orbit-coupled Bose-Einstein condensate in thermodynamic cycles by proposing a quantum heat engine using the condensate as a working medium. The cooling and heating processes are simulated through the contacts between the condensate and external magnetized and demagnetized media. The efficiency of the proposed engine is then studied, with the existence of a critical value of spin-orbit coupling that is related to the engine's maximum efficiency.
Article
Physics, Multidisciplinary
Yuanyuan Chen, Hao Lyu, Yong Xu, Yongping Zhang
Summary: This study investigates the elementary excitations of a spin-orbit-coupled spin-1 Bose-Einstein condensate in different phases, and finds that these excitations depend on the spin-orbit coupling parameters.
NEW JOURNAL OF PHYSICS
(2022)
Article
Engineering, Mechanical
Kashif Ammar Yasir, Yu Chengyong, Gao Xianlong
Summary: In this study, we investigate the steady-state multi-stability of a cavity system containing spin-orbit coupled Bose-Einstein condensate. We show that the cavity photon number and atomic population exhibit multi-stable behavior, which can be tuned with system parameters. Additionally, we find the occurrence of population transitional phase for the atomic states, which can be controlled by spin-orbit coupling and Zeeman field effects.
NONLINEAR DYNAMICS
(2023)
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
Physics, Multidisciplinary
Hui Guo, Xu Qiu, Yan Ma, Hai-Feng Jiang, Xiao-Fei Zhang
Summary: The dynamics of bright solitons in a spin-orbit coupled spin-1 Bose-Einstein condensate were investigated both analytically and numerically. It was found that the spin-orbit coupling couples the soliton's spin with its center-of-mass motion, resulting in periodical oscillation of the center-of-mass. The motion of the center-of-mass of the soliton can be viewed as a superposition of periodical and linear motions.
Article
Physics, Multidisciplinary
Xuan Xu, Chao Gao, Ji Lin, Hui-jun Li
Summary: In this study, we investigate the effects of spin-orbit coupling, external potential, and rotation frequency/direction on the profile and stability of a striped state in a two-dimensional Bose-Einstein condensate. We find that the number of stripes in both spinor components increases with the strength of spin-orbit coupling, while the difference in striped numbers remains one. The addition of a rotation term changes the profiles of the spinor components qualitatively and alters the regulation of the striped numbers, but the difference in striped numbers remains one. Furthermore, the rotation direction only causes an exchange between the striped states of the two spinor components, and the rotation frequency leads to a transition from the striped state to a mixture of striped and vortex states.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2022)
Article
Physics, Multidisciplinary
Peng-Hong Lu, Xiao-Fei Zhang, Chao-Qing Dai
Summary: In this study, the dynamics and formation of ring dark solitons in a two-dimensional Bose-Einstein condensate with the Rashba spin-orbit coupling were investigated. The system exhibits complex behaviors in the presence of the spin-orbit coupling, including prolonged lifetime of ring dark solitons and significantly affected attenuation kinetics.
FRONTIERS OF PHYSICS
(2022)
Article
Physics, Multidisciplinary
Hui Yang, Xianghua Su, Yu Zhang, Linghua Wen
Summary: In a rotating spin-1 ferromagnetic Bose-Einstein condensate with spin-orbit coupling in an in-plane quadrupole field, a rich variety of exotic vortex structures are sustained, leading to the support of four typical quantum phases. The nonrotating system transitions between different vortex structures with increasing quadrupole field strength, while the system without rotation but with spin-orbit coupling exhibits unique spin textures and vortex excitations.
COMMUNICATIONS IN THEORETICAL PHYSICS
(2022)
Article
Physics, Condensed Matter
S. K. Adhikari
Summary: This study investigates supersolid-like states in a quasi-two-dimensional trapped Rashba and Dresselhaus spin-orbit coupled spin-1 condensate. Different types of states are formed depending on the strength of spin-orbit coupling, including superlattice/superstripe states and multi-ring states. These states are found to be dynamically stable and will contribute to a better understanding of crystallization in solids.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2021)
Article
Materials Science, Multidisciplinary
Qingbo Wang, Wenjing Zhao, Linghua Wen
Summary: The study reveals that spin-orbit coupling has a significant influence on the dynamics of kicked pseudo-spin-1/2 Bose-Einstein condensates under different conditions, mainly reflected in the different behaviors of density distribution and energy evolution.
RESULTS IN PHYSICS
(2021)
Article
Materials Science, Multidisciplinary
Haiming Deng, Tianzhe Wan, Yichen He, Tao Han, Jianquan Huang, Shufang Ding, Yalan Li, Dajun Lei, Chunzhi Jiang, Min Yao, Hao Chen, Chao Kong
Summary: This paper explores the properties of normal and abnormal Bloch states of a spin-orbit coupled Bose-Einstein condensate confined in a periodic lattice, with a focus on population transfer and superflow effects. It is found that the Rabi coupling strength can modulate the population transfer between Bloch states, and the transition between superfluid state and critical balance state can be realized by adjusting system parameters, which may aid in quantum transport of the cold-atom system with spin-orbit coupling.
RESULTS IN PHYSICS
(2021)
Article
Computer Science, Interdisciplinary Applications
Rajamanickam Ravisankar, Dusan Vudragovic, Paulsamy Muruganandam, Antun Balaz, Sadhan K. Adhikari
Summary: This paper presents OpenMP versions of FORTRAN programs for solving the Gross-Pitaevskii equation for a harmonically trapped three-component spin-1 spinor Bose-Einstein condensate. The programs include different forms of spin-orbit and Rabi couplings in 1D and 2D spatial dimensions, utilizing split-step Crank-Nicolson discretization for imaginary- and real-time propagation. The programs can calculate stationary states, BEC dynamics, and various physical quantities, with outputs such as wave function, energy, and density profiles.
COMPUTER PHYSICS COMMUNICATIONS
(2021)
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
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
Multidisciplinary Sciences
Xi Li, Xiang Luo, Shuai Wang, Ke Xie, Xiang-Pei Liu, Hui Hu, Yu-Ao Chen, Xing-Can Yao, Jian-Wei Pan
Summary: In this study, second sound attenuation in a homogeneous Fermi gas of lithium-6 atoms has been observed at the superfluid transition temperature using Bragg spectroscopy in the long-wavelength limit. The temperature dependence of second sound diffusivity and thermal conductivity has been obtained, and a sudden rise in both diffusivity and conductivity near the critical temperature suggests a larger critical region in the Fermi gas compared to liquid helium. These findings lay the groundwork for determining universal critical scaling functions near quantum criticality.
Article
Physics, Multidisciplinary
Jia Wang, Xia-Ji Liu, Hui Hu
Summary: In this study, we investigate a heavy impurity immersed in an interacting Fermi superfluid using the exact functional determinant approach. We analyze the impact of the pairing gap on the properties of quasiparticles revealed by two spectroscopies. The results show interesting phenomena, such as dark continuum, molecule-hole continuum, and repulsive polaron, depending on the scattering conditions.
PHYSICAL REVIEW LETTERS
(2022)
Article
Materials Science, Multidisciplinary
Jia-Jia Luo, Han Pu, Xi -Wen Guan
Summary: In this study, a rigorous understanding of the one-dimensional repulsive Fermi-Hubbard model is provided based on the solutions to the thermodynamic Bethe ansatz equations. The fractional excitations, universal properties, and asymptotic of correlation functions in various phases are calculated and analyzed. The interaction-driven phase transition and its relationship with the contact susceptibilities and variations of density, magnetization, and entropy are also investigated. Furthermore, a quantum cooling scheme based on the interaction-driven refrigeration cycle is proposed as an application of these concepts, which are applicable to higher-dimensional systems.
Article
Physics, Fluids & Plasmas
Ria Rushin Joseph, Jesse van Rhijn, Peter D. Drummond
Summary: This paper proposes a combined midpoint projection algorithm that uses a midpoint projection onto a tangent space, combined with a subsequent normal projection to satisfy the constraints. The Stratonovich form of stochastic calculus is obtained with finite bandwidth noise in the presence of a strong external potential that constrains the resulting physical motion to a manifold. Numerical examples demonstrate the effectiveness of the method for a wide range of manifolds and multiple constraints.
Article
Materials Science, Multidisciplinary
Chunping Gao, Zheng Tang, Fei Zhu, Yunbo Zhang, Han Pu, Li Chen
Summary: This paper investigates the impact of local gauge symmetry on quantum thermalization breaking and finds that disorder-free quantum many-body localization and entropy prethermalization can occur in a system with a specific interaction by introducing four-fermion interaction. The interplay between fermion interaction and U(1) gauge symmetry endows gauge fields with disordered potential, leading to anomalous behaviors in the long-time evolution of various quantities. This work provides a different platform to explore emergent nonthermal dynamics in state-of-the-art quantum simulators with gauge symmetries.
Correction
Physics, Multidisciplinary
Chaohong Lee, Peter D. Drummond, Masahito Ueda
FRONTIERS OF PHYSICS
(2023)
Article
Optics
Hui Hu, Xia-Ji Liu
Summary: In this study, the finite-temperature Raman spectroscopy of a mobile impurity in a Fermi bath in three dimensions is calculated using a non-self-consistent many-body T-matrix theory. The dependencies of the Raman spectrum on the transferred momentum, temperature, and impurity-bath interaction are discussed. The theoretical prediction is compared with recent experimental measurement, showing good quantitative agreement at weak coupling but worse agreement near the Feshbach resonance. At strong coupling, an unrealistic Fermi bath temperature may be needed to explain the experimental data.
Article
Optics
Hui Hu, Hui Deng, Xia-Ji Liu
Summary: We present a many-body theory for the interactions of two-dimensional exciton-polaritons beyond the Born approximation. Taking into account Gaussian quantum fluctuations via the Bogoliubov theory, we find that the exciton-exciton scattering is strongly renormalized by the light-matter coupling and acquires an inverse logarithmic dependence on the lower polariton energy. Our predictions may provide a qualitatively correct guide for studies of exciton and polariton nonlinearities and suggest a route to achieving strongly nonlinear polariton gases.
Article
Optics
Xiao-Long Chen, Xia-Ji Liu, Hui Hu
Summary: This study investigates the superfluidity of a weakly interacting Bose gas with one-dimensional Raman-type spin-orbit coupling at both zero and finite temperatures. The results show agreement between the superfluid density at zero temperature and previous predictions, while at finite temperatures, there is a nonmonotonic temperature dependence possibly related to the sound velocity and Landau critical velocity.
Article
Optics
Jia Wang, Xia-Ji Liu, Hui Hu
Summary: In this study, we investigate a system of a heavy impurity embedded in a paired two-component Fermi gas. By extending the functional determinant approach, we are able to understand the polaron physics in the system, including the effects of the pairing gap in the BCS superfluid.
Article
Optics
Hui Hu, Xia-Ji Liu
Summary: We conducted a systematic study on a mobile impurity immersed in a three-dimensional Fermi sea of fermions at finite temperature. By using the standard non-self-consistent many-body T-matrix theory, we determined the impurity spectral function and avoided potential errors in previous calculations. The results showed that the quasiparticle decay rate of both attractive and repulsive polarons does not increase significantly with increasing temperature in the weak-coupling limit, while near the unitary limit with strong coupling, the decay rate of Fermi polarons rapidly increases and the quasiparticle picture breaks down close to the Fermi temperature.
Article
Optics
Hui Hu, Jia Wang, Jing Zhou, Xia-Ji Liu
Summary: This paper investigates the zero-temperature quasiparticle properties of a mobile impurity in a strongly interacting Fermi superfluid. It shows that the repulsive polaron branch becomes less well defined due to the existence of a significant pairing gap Delta, while the attractive polaron branch becomes more robust at finite momentum.