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Spontaneous symmetry breaking of a Bose–Fermi mixture in a two-dimensional double-well potential |
Wang Yuan-Sheng(王元生), Yan Pei-Gen(颜培根), Li Bin(李彬), and Liu Xue-Shen(刘学深)† |
Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China |
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Abstract We study the spontaneous symmetry breaking of a superfluid Bose-Fermi mixture in a two-dimensional double-well potential. The mixture is described by a set of coupled Gross-Pitaevskii equations. The symmetry breaking phenomenon is demonstrated in the two-dimensional double-well potential in the mixture. The results are summarized in the phase diagrams of the mixture particle numbers, which are divided into symmetric and asymmetric regions by the asymmetry ratios. The dynamical pictures of the spontaneous symmetry breaking induced by a gradual transformation of the single-well potential into a double-well one are also illustrated. The properties of the quantum degenerate mixture are explored using the realistic parameters for a 40K-87Rb system.
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Received: 02 August 2011
Revised: 24 August 2011
Accepted manuscript online:
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PACS:
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03.75.Ss
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(Degenerate Fermi gases)
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03.75.Hh
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(Static properties of condensates; thermodynamical, statistical, and structural properties)
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Fund: Project supported by the National Natural Science Foundation of China (Grant Nos. 10974068 and 11174108). |
Cite this article:
Wang Yuan-Sheng(王元生), Yan Pei-Gen(颜培根), Li Bin(李彬), and Liu Xue-Shen(刘学深) Spontaneous symmetry breaking of a Bose–Fermi mixture in a two-dimensional double-well potential 2012 Chin. Phys. B 21 010309
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