Adiabatic geometric phase for a Bose-Einstein condensate coupled to a cavity

Adiabatic geometric phase for a Bose-Einstein condensate coupled to a cavity
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耦合到空腔的玻色-爱因斯坦凝聚体的绝热几何相

DOI:
10.1103/physreva.84.053610
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发表时间:
2011-11
期刊:
影响因子:
2.9
通讯作者:
Liu, Jie
Liu, Jie
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Li, Sheng-Chang;Fu, Li-Bin;Liu, Jie

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研究了玻色-爱因斯坦凝聚体与光腔耦合模型中的几何相位,其中凝聚体和光腔都用相干态描述。当原子-腔耦合项的幅角随时间从0缓慢变化到2{pi}时,我们计算了基态累积的几何相位,得到了它的解析表达式。我们发现,绝热几何相位从零跳到非平凡{π}在一个临界值,对应于正常的超辐射相变点。本文还讨论了几何相位的类磁通解释。
We investigate the geometric phase in a model of a Bose-Einstein condensate coupled to an optical cavity in which both the condensate and the cavity are described with coherent states. When the argument of the atom-cavity coupling term varies in time slowly from zero to 2{pi}, we calculate the geometric phase accumulated by the ground state and obtain its analytic expression in explicit form. We find that the adiabatic geometric phase jumps from zero to nontrivial {pi} at a critical value that corresponds to the normal-superradiant phase-transition point. The magneticlike flux interpretation of the geometric phase is also discussed.
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