Many-Body State and Dynamic Behaviour of the Pair-Correlation Function of a Small Bose–Einstein Condensate Confined in a Ring Potential

被引：0
作者：
A. Roussou
J. Smyrnakis
M. Magiropoulos
G. M. Kavoulakis
机构：
[1] Hellenic Mediterranean University,Department of Physics
[2] Chalmers University of Technology,HMU Research Center
[3] Institute of Emerging Technologies,undefined
来源：
Journal of Low Temperature Physics | 2023年 / 210卷
关键词：
Bose–Einstein condensation; Cold atoms; Boson degeneracy; Superfluidity;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
We investigate the many-body state and the static and the dynamic behaviour of the pair-correlation function of a Bose–Einstein condensate with a finite atom number, which is confined in a quasi-one-dimensional toroidal/annular potential, both for repulsive, and for attractive interactions. We link the dynamic pair-correlation function that we evaluate with the problem of quantum time crystals. For weak repulsive interatomic interactions and a finite number of atoms the pair-correlation function shows a periodic temporal behaviour, which disappears in the limit of a large atom number, in agreement with general arguments. Finally we provide some insight into older results of attractive interactions, where the time-crystalline behaviour exists only in the limit of a large atom number.
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页码：51 / 67
页数：16
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