Phase transition of Bose-Einstein condensate under decoherence

被引：2

作者：

Zheng Qiang ^{[1
]}

Yi Shan-Feng ^{[1
]}

Hu Chang-Gang ^{[2
]}

机构：

[1] Guizhou Normal Univ, Sch Math & Comp Sci, Guiyang 550001, Peoples R China

[2] Guizhou Normal Univ, Sch Chem & Mat Sci, Guiyang 550001, Peoples R China

来源：

CHINESE PHYSICS B | 2014年 / 23卷 / 02期

基金：

中国国家自然科学基金;

关键词：

Bose-Einstein condensate; phase transition; operator fidelity; INTRINSIC DECOHERENCE; QUANTUM; SUPERFLUID; INSULATOR; DYNAMICS;

D O I：

10.1088/1674-1056/23/2/026401

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The effect of decoherence on the phase transition of a Bose-Einstein condensate in a symmetric double-well potential is determined by the mean atom number difference. It still has two phases, the tunneling phase and the self-trapping phase, even under decoherence. The density matrix and the operator fidelity also show very different behaviors in the two phases. This suggests that operator fidelity can be used to characterize the phase transition of this Bose-Einstein condensate model, even under decoherence.

引用

页数：4

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