Adiabatic tunneling of Bose-Einstein condensates with modulated atom interaction in a double-well potential

We study the adiabatic tunneling of Bose-Einstein condensates in a symmetric double-well potential when the inter- action strength between the atoms is modulated linearly or in a cosine periodic form. It is shown that the system evolves along a nonlinear eigenstate path. In the case of linear modula...

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Bibliographic Details
Published inChinese physics B Vol. 23; no. 7; pp. 284 - 287
Main Authors Xin, Xiao-Tian, Huang, Fang, Xu, Zhi-Jun, Li, Hai-Bin
Format Journal Article
LanguageEnglish
Published 01.07.2014
Subjects
Adiabatic flow
Approximation
Bose-Einstein condensates
Condensates
Modulation
Nonlinearity
Phase diagrams
Tunneling
原子相互作用
双势阱
本征态
爱因斯坦凝聚
玻色
线性调制
绝热过程
非线性
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Summary:We study the adiabatic tunneling of Bose-Einstein condensates in a symmetric double-well potential when the inter- action strength between the atoms is modulated linearly or in a cosine periodic form. It is shown that the system evolves along a nonlinear eigenstate path. In the case of linear modulation under the adiabatic approximation conditions, the tun- neling probability of the condensate atoms to the other potential well is half. However, when the system is periodically scanned in the adiabatic process, we find an interesting phenomenon. A small change in the cycle period can lead to the condensate atoms returning to the right well or tunneling to the left well. The system comes from a linear eigenstate back to a nonlinear one, which is completely different from the linear eigenstate evolution. We explain the results by using the energy level and the phase diagram.
Bibliography:We study the adiabatic tunneling of Bose-Einstein condensates in a symmetric double-well potential when the inter- action strength between the atoms is modulated linearly or in a cosine periodic form. It is shown that the system evolves along a nonlinear eigenstate path. In the case of linear modulation under the adiabatic approximation conditions, the tun- neling probability of the condensate atoms to the other potential well is half. However, when the system is periodically scanned in the adiabatic process, we find an interesting phenomenon. A small change in the cycle period can lead to the condensate atoms returning to the right well or tunneling to the left well. The system comes from a linear eigenstate back to a nonlinear one, which is completely different from the linear eigenstate evolution. We explain the results by using the energy level and the phase diagram.
adiabatic tunneling, Bose-Einstein condensates, double-well potential
11-5639/O4
ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
ISSN:1674-1056
2058-3834
1741-4199
DOI:10.1088/1674-1056/23/7/070307