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Chin. Phys. B, 2014, Vol. 23(2): 026701    DOI: 10.1088/1674-1056/23/2/026701
CONDENSED MATTER: STRUCTURAL, MECHANICAL, AND THERMAL PROPERTIES Prev   Next  

Condensation of Fermions in the double-well potential

Chen Xin-Wei (陈欣委), Liu Zhong-Qiang (刘中强), Kong Xiang-Mu (孔祥木)
College of Physics and Engineering, Qufu Normal University, Qufu 273165, China
Abstract  The density distribution of ultracold two-component fermionic gases 6Li, which are confined in a gradient magnetic field and a symmetrical double-well potential, is investigated by employing local-density approximation. It is found that three different regimes including quasi-molecular Bose–Einstein condensation (BECm), the dimers in the unitarity limit (ULd), and Bardeen–Cooper–Schrieffer superfluid (BCS) can coexist at the same time. Furthermore, the ranges of these regimes can be controlled to some extent by tuning the gradient of the magnetic field and the parameters characterizing the properties of the double-well potential. This study is of guidance and significance for experimentally realizing the coexistence of BECm, ULd, and BCS in the double-well potential.
Keywords:  molecular Bose–Einstein condensation      unitarity limit      Bardeen–Cooper–Schrieffer superfluid  
Received:  22 April 2013      Revised:  11 June 2013      Accepted manuscript online: 
PACS:  67.10.Db (Fermion degeneracy)  
  67.85.Lm (Degenerate Fermi gases)  
  03.75.Ss (Degenerate Fermi gases)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No. 11275112), the Natural Science Foundation of Shandong Province of China (Grant No. ZR2011AM018), and the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20103705110004).
Corresponding Authors:  Kong Xiang-Mu     E-mail:  kongxm@mail.qfnu.edu.cn
About author:  67.10.Db; 67.85.Lm; 03.75.Ss

Cite this article: 

Chen Xin-Wei (陈欣委), Liu Zhong-Qiang (刘中强), Kong Xiang-Mu (孔祥木) Condensation of Fermions in the double-well potential 2014 Chin. Phys. B 23 026701

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