Many-body quantum fluctuation effects of Rosen-Zener transition in Bose-Einstein condensates

被引：2

作者：

Wang Jian-Zhong ^{[1
,2
,3
]}

Cao Hui ^{[1
]}

Dou Fu-Quan ^{[1
]}

机构：

[1] Beijing Inst Technol, Sch Phys, Beijing 100081, Peoples R China

[2] Inst Appl Phys & Computat Math, Natl Key Lab Sci & Technol Computat Phys, Beijing 100088, Peoples R China

[3] Peking Univ, HEDPS Ctr Appl Phys & Technol, Beijing 100084, Peoples R China

来源：

ACTA PHYSICA SINICA | 2012年 / 61卷 / 22期

基金：

国家高技术研究发展计划(863计划);

关键词：

Bose-Einstein condensates; Rosen-Zener transition; many-body effects; MODEL; VALIDITY; STATE; GAS;

D O I：

10.7498/aps.61.220305

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate many-body quantum fluctuation effects of Rosen-Zener transition of Bose-Einstein condensate (BEC) in a symmetric double-well potential through the relation between the average population imbalance of the final state (APIFS) and scanning period. In the linear case, we deduce the analytical expression of the APIFS which has the same behavior as in the mean-field level. We also employ numerical calculation to demonstrate it. In the nonlinear case, numerical results show that the APIFS in the sudden limit also accords with that in the mean-field level whereas in the adiabatic limit the many-body result is quite different from that of the mean-field case: the behavior of APIFS with respect to scanning period is similar to sinusoidal rather than rectangular oscillation, besides the oscillation period increases with both the total number N and the nonlinear parameter c increasing.

引用

页数：7

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