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

Atomic interaction leads to dephasing and damping of Bloch oscillations (BOs) in optical lattices, which limits observation 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...

Full description

Saved in:
Bibliographic Details
Published in:Chinese physics B 2024-04, Vol.33 (4), p.40305
Main Authors: Zhang, Ai-Xia, Zhang, Wei, Wang, Jie, Hu, Xiao-Wen, Mi, Lai-Lai, Xue, Ju-Kui
Format: Article
Language:English
Subjects:
atomic interaction
Bloch oscillations
Bose-Einstein condensate
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Atomic interaction leads to dephasing and damping of Bloch oscillations (BOs) in optical lattices, which limits observation 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.
ISSN:1674-1056
2058-3834
DOI:10.1088/1674-1056/ad1b46