Spontaneous symmetry breaking of a Bose–Fermi mixture in a two-dimensional double-well potential

doi:10.1088/1674-1056/21/1/010309

中国物理B ›› 2012, Vol. 21 ›› Issue (1): 10309-010309.doi: 10.1088/1674-1056/21/1/010309

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Spontaneous symmetry breaking of a Bose–Fermi mixture in a two-dimensional double-well potential

王元生, 颜培根, 李彬, 刘学深

Institute of Atomic and Molecular Physics, Jilin University, Changchun 130012, China

收稿日期:2011-08-02 修回日期:2011-08-24 出版日期:2012-01-15 发布日期:2012-01-20
基金资助:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10974068 and 11174108).

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

Received:2011-08-02 Revised:2011-08-24 Online:2012-01-15 Published:2012-01-20
Supported by:
Project supported by the National Natural Science Foundation of China (Grant Nos. 10974068 and 11174108).

摘要/Abstract

摘要： 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.

关键词: spontaneous symmetry breaking, Bose-Fermi mixture, double-well potential

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.

Key words: spontaneous symmetry breaking, Bose-Fermi mixture, double-well potential

中图分类号: (Degenerate Fermi gases)

03.75.Ss

03.75.Hh (Static properties of condensates; thermodynamical, statistical, and structural properties)

王元生, 颜培根, 李彬, 刘学深. Spontaneous symmetry breaking of a Bose–Fermi mixture in a two-dimensional double-well potential[J]. 中国物理B, 2012, 21(1): 10309-010309.

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[J]. Chin. Phys. B, 2012, 21(1): 10309-010309.

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Spontaneous symmetry breaking of a Bose–Fermi mixture in a two-dimensional double-well potential

Spontaneous symmetry breaking of a Bose–Fermi mixture in a two-dimensional double-well potential

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