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Chaos signatures of current phase transition in a toroidal trap

Authors :
Li, Zhiqiang
Hu, Xiaoxiao
Zeng, Zhao-Yun
Chen, Yajiang
Chen, Ai-Xi
Luo, Xiaobing
Publication Year :
2023

Abstract

In this work we demonstrate how the directed motion of atomic Bose-Einstein condensates in a toroidal trap can be controlled by applying a zero-mean oscillatory driving field. We show that due to the self-trapping effect in momentum space, the oscillatory amplitude of the current can be significantly suppressed and a nearly constant directed current can be obtained preserving the initial current values, by decreasing the driving amplitude, even when the atomic interactions are relatively small. We also reveal numerically the mean-field chaos can serve as an indicator of a quantum phase transition between the vanishing current regime and nonvanishing current regime. Our results are corroborated by an effective three-mode model, which provides an excellent account of the ratchet dynamics of the system.<br />Comment: 7 pages, 9 figures

Subjects

Subjects :
Quantum Physics

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2309.06678
Document Type :
Working Paper