检索结果-南通市图书馆

bose-einstein condensates in Optical Lattices with Higher-Order Interactions

在线全文

学校读者我要写书评

暂无评论

Communications in Theoretical Physics 2012年第4期57卷 595-602页

作者：张爱霞薛具奎 Key Laboratory of Atomic&Molecular Physics and Functional Materials of Gansu Province College of Physics and Electronics EngineeringNorthwest Normal University

The higher-order interactions of bose-einstein condensate in multi-dimensional optical lattices are discussed both analytically and *** is demonstrated that the effects of the higher-order atomic interactions on the sound speed and the stabilities of Bloch waves strongly depend on the lattice *** the presence of higher-order effects,tighter and high-dimensional lattices are confirmed to be two positive factors for maintaining the system's energetic stability,and the dynamical instability of Bloch waves can take place simultaneously with the energetic *** addition,we find that the higher-order interactions exhibit a long-range behavior and the long-lived coherent Bloch oscillations in a tilted optical lattice *** results provide an effective way to probe the higher-order interactions in optical lattices.

关键词： bose-einstein condensates optical lattices higher-order interactions

Lattice configurations in spin-1 bose–einstein condensates with the SU(3) spin–orbit coupling

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2020年第10期29卷 172-179页

作者： Ji-Guo Wang Yue-Qing Li Yu-Fei Dong Department of Mathematics and Physics Shijiazhuang TieDao UniversityShijiazhuang 050043China Institute of Applied Physics Shijiazhuang TieDao UniversityShijiazhuang 050043China

We consider the SU(3) spin–orbit coupled spin-1 bose–einstein condensates in a two-dimensional harmonic trap. The competition between the SU(3) spin–orbit coupling and the spin-exchange interaction results in a rich variety of lattice configurations. The ground-state phase diagram spanned by the isotropic SU(3) spin–orbit coupling and the spin–spin interaction is presented. Five ground-state phases can be identified on the phase diagram, including the plane wave phase, the stripe phase, the kagome lattice phase, the stripe-honeycomb lattice phase, and the honeycomb hexagonal lattice phase. The system undergoes a sequence of phase transitions from the rectangular lattice phase to the honeycomb hexagonal lattice phase, and to the triangular lattice phase in spin-1 bose–einstein condensates with anisotrpic SU(3) spin–orbit coupling.

关键词： bose-einstein condensates lattice configurations SU(3)spin-orbit coupling

Stabilised bright solitons in bose-einstein condensates in an expulsive parabolic and complex potential

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2010年第7期19卷 73-78页

作者：张涛杨战营赵立臣岳瑞宏 Department of Physics Northwest University Department of Physics Ningbo University

The exact solitonic solutions of the one-dimensional nonlinear Schroedinger equation, which describes the dynamics of bright soliton in bose-einstein condensates with the time-dependent interaction in an expulsive parabolic and complex potential, are obtained by Darboux transformation. The results show that one can compress a bright soliton into an assumed peak of matter wave density by adusting the experimental parameter of the ratio of axial oscillation to radial oscillation or feeding parameter. Especially, when parameters satisfy the relation λ = 2γ the soliton is stable with time evolution without changing its shape and amplitude.

关键词： bose-einstein condensates one-dimensional Gross Pitaevskii equation bright soliton

Adjustable half-skyrmion chains induced by SU(3)spin-orbit coupling in rotating bose-einstein condensates

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2021年第11期30卷 261-267页

作者： Li Wang Ji Li Xiao-Lin Zhou Xiang-Rong Chen Wu-Ming Liu College of Physics Sichuan UniversityChengdu 610065China College of Physics Taiyuan Normal UniversityJinzhong 030619China School of Physics and Electronic Engineering Sichuan Normal UniversityChengdu 610101China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China

The ground state properties of the rotating bose–einstein condensates(BECs) with SU(3) spin–orbit coupling(SOC)in a two-dimensional harmonic trap are studied. The results show that the ferromagnetic and antiferromagnetic systems present three half-skyrmion chains at an angle of 120°to each other along the coupling directions. With the enhancement of isotropic SU(3) SOC strength, the position of the three chains remains unchanged, in which the number of half-skyrmions increases gradually. With the increase of rotation frequency and atomic density–density interaction, the number of halfskyrmions on the three chains and in the regions between two chains increases gradually. The relationships of the total number of half-skyrmions on the three chains with the increase of SU(3) SOC strength, rotation frequency and atomic density–density interaction are also given. In addition, changing the anisotropic SU(3) SOC strength can regulate the number and morphology of the half-skyrmion chains.

关键词： bose-einstein condensates SU(3)spin-orbit coupling rotation half-skyrmion chains

Vortex chains induced by anisotropic spin-orbit coupling and magnetic field in spin-2 bose-einstein condensates

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2022年第6期31卷 204-210页

作者： Hao Zhu Shou-Gen Yin Wu-Ming Liu Key Laboratory of Display Materials and Photoelectric Devices(Ministry of Education) Tianjin Key Laboratory for Photoelectric Materials and DevicesSchool of Materials Science and EngineeringTianjin University of TechnologyTianjin 300384China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of SciencesBeijing 100190China School of Physical Sciences University of Chinese Academy of SciencesBeijing 100190China Songshan Lake Materials Laboratory Dongguan 523808China

We investigate the anisotropic spin-orbit coupled spin-2 bose-einstein condensates with Ioffe-Pritchard magnetic *** nonzero magnetic field,anisotropic spin-orbit coupling will introduce several vortices and further generate a vortex *** the vortex chain,the vortices connect to each other,forming a line along the *** physical nature of the vortex chain can be explained by the particle current and the momentum *** vortex number inside the vortex chain can be influenced via varying the magnetic *** adjusting the anisotropy of the spin-orbit coupling,the direction of the vortex chain is changed,and the vortex lattice can be ***,accompanied by the variation of the atomic interactions,the density and the momentum distribution of the vortex chain are *** realization and the detection of the vortex chain are compatible with current experimental techniques.

关键词： vortex chain anisotropic spin-orbit coupling magnetic field bose-einstein condensates

Effect of interaction strength on gap solitons of bose-einstein condensates in optical lattices

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2008年第4期17卷 1189-1195页

作者：杨如曙杨江河 Department of Electric Engineering Hunan University of Arts and Science

We have developed a systematic analytical approach to the study on the dynamic properties of the linear and the nonlinear excitations for quasi-one-dimensional bose-einstein condensate trapped in optical lattices. A novel linear dispersion relation and an algebraic soliton solution of the condensate are derived analytically under consideration of bose-einstein condensate with a periodic potential. By analysing the soliton solution, we find that the interatomic interaction strength has an important effect on soliton dynamic properties of bose-einstein condensate.

关键词： bose-einstein condensates solitons optical lattices

Stability properties of vector solitons in two-component bose-einstein condensates with tunable interactions

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2011年第2期20卷 54-59页

作者：张晓斐张培和万全刘循序 College of Science Honghe University Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of Sciences

By using a unified theory of the formation of various types of vector-solitons in two-component bose-einstein condensates with tunable interactions, we obtain a family of exact vector-soliton solutions for the coupled nonlinear Schrodinger equations. Moreover, the Bogoliubov equation shows that there exists stable dark soliton in specific situa- tions. Our results open up new ways in considerable experimental interest for the quantum control of multi-component bose einstein condensates.

关键词： bose-einstein condensates vector soliton Bogoliubov equation

Tunable ground-state solitons in spin–orbit coupling bose–einstein condensates in the presence of optical lattices

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2017年第8期26卷 54-60页

作者：张华峰陈方郁春潮孙利辉徐大海 Institute of Quantum Optics and Information Photonics Yangtze UniversityJingzhou 434023China School of Physics and Optoelectronic Engineering Yangtze UniversityJingzhou 434023China

Properties of the ground-state solitons, which exist in the spin-orbit coupling （SOC） bose-einstein condensates （BEC） in the presence of optical lattices, are presented. Results show that several system parameters, such as SOC strength, lattice depth, and lattice frequency, have important influences on properties of ground state solitons in SOC BEC. By controlling these parameters, structure and spin polarization of the ground-state solitons can be effectively tuned, so ma- nipulation of atoms may be realized.

关键词： spin-orbit coupling bose-einstein condensates optical lattices

Manipulating vortices in F=2 bose-einstein condensates through magnetic field and spin-orbit coupling

在线全文

学校读者我要写书评

暂无评论

Chinese Physics B 2022年第4期31卷 151-156页

We investigate the vortex structures excited by Ioffe-Pritchard magnetic field and Dresselhaus-type spin-orbit coupling in F=2 ferromagnetic bose-einstein *** the weakly interatomic interacting regime,an external magnetic field can generate a polar-core vortex in which the canonical particle current is *** the combined effect of spin-orbit coupling and magnetic field,the ground state experiences a transition from polar-core vortex to Mermin-Ho vortex,in which the canonical particle current is *** fixed spin-orbit coupling strengths,the evolution of phase winding,magnetization,and degree of phase separation with magnetic field are ***,with further increasing spin-orbit coupling strength,the condensate exhibits symmetrical density domains separated by radial vortex *** work paves the way to explore exotic topological excitations in high-spin systems.

关键词： bose-einstein condensates vortex magnetic field spin-orbit coupling