首页|Coherence of nonlinear Bloch dynamics of Bose-Einstein condensates in deep optical lattices

Coherence of nonlinear Bloch dynamics of Bose-Einstein condensates in deep optical lattices

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Atomic interaction leads to dephasing and damping of Bloch oscillations(BOs)in optical lattices,which limits obser-vation and applications of BOs.How to obtain persistent BOs is particularly important.Here,the nonlinear Bloch dynamics of the Bose-Einstein condensate with two-body and three-body interactions in deep optical lattices is studied.The damping rate induced by interactions is obtained.The damping induced by two-body interaction plays a dominant role,while the damping induced by three-body interaction is weak.However,when the two-body and three-body interactions satisfy a threshold,long-lived coherent BOs are observed.Furthermore,the Bloch dynamics with periodical modulation of linear force is studied.The frequencies of linear force corresponding to resonance and pseudoresonance are obtained,and rich dynamical phenomena,i.e.,stable and strong BOs,drifting and dispersion of wave packet,are predicted.The controllable Bloch dynamics is provided with the periodic modulation of the linear force.

Bose-Einstein condensateatomic interactionBloch oscillations

张爱霞、张薇、王杰、胡潇文、米来来、薛具奎

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College of Physics and Electronics Engineering,Northwest Normal University,Lanzhou 730070,China

国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金国家自然科学基金甘肃省自然科学基金Scientific Research Project of Gansu Higher EducationInnovation Capability Enhancement Project of Gansu Higher EducationInnovation Capability Enhancement Project of Gansu Higher EducationCreation of Science and Technology of Northwest Normal University

122640451216404211764039118473041186501417JR5RA07620JR5RA5262016A-0052020A-1462019A-014NWNU-LKQN-18-33

2024

10.1088/1674-1056/ad1b46

中国物理B(英文版)
中国物理学会和中国科学院物理研究所

中国物理B(英文版)

CSTPCDEI
影响因子：0.995
ISSN：1674-1056
年,卷(期)：2024.33(4)
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