中国物理B ›› 2008, Vol. 17 ›› Issue (5): 1601-1606.doi: 10.1088/1674-1056/17/5/012

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Squeezing via coupling of Bose--Einstein condensates in a double-well potential with a cavity light field

詹明生1, 周 鲁2, 孔令波2   

  1. (1)State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China; (2)State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China;Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China;Gra
  • 收稿日期:2007-09-26 修回日期:2007-09-28 出版日期:2008-05-20 发布日期:2008-05-20
  • 基金资助:
    Project supported by the National Basic Research Program of China (Grant No 2006CB921203), the National Natural Science Foundation of China (Grant No 10474119) and China Postdoctoral Science Foundation.

Squeezing via coupling of Bose--Einstein condensates in a double-well potential with a cavity light field

Zhou Lu(周鲁)a)b)c)d)†, Kong Ling-Bo(孔令波)a)b)c), and Zhan Ming-Sheng(詹明生)a)b)   

  1. a State Key Laboratory of Magnetic Resonance and Atomic and Molecular Physics, Wuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China; b Center for Cold Atom Physics, Chinese Academy of Sciences, Wuhan 430071, China; c Graduate School of the Chinese Academy of Sciences, Beijing 100080, China; d State Key Laboratory of Precision Spectroscopy, Department of Physics, East China Normal University, Shanghai 200062, China
  • Received:2007-09-26 Revised:2007-09-28 Online:2008-05-20 Published:2008-05-20
  • Supported by:
    Project supported by the National Basic Research Program of China (Grant No 2006CB921203), the National Natural Science Foundation of China (Grant No 10474119) and China Postdoctoral Science Foundation.

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摘要： Squeezing via the interaction between the cavity light field and the Bose--Einstein Condensate (BEC) in a double-well potential is considered within the context of the two-mode approximation. For the cavity light field initially in a coherent state, it is shown that by choosing appropriate parameters, quadrature squeezing of the cavity light field can be achieved and it exhibits periodic oscillation. We also study the case in which BEC is tuned to resonance by periodically modulating the trapping potential, and the quadrature squeezing of the cavity field exhibits periodic collapse and revival effect. Both analytic and numerical calculations are performed, and they are found to be in good agreement with each other. The result shows that the quantum statistical properties of the cavity light field can be manipulated by its coupling with the condensates in the double-well potential. On the other hand, dynamical properties of the condensates in the double-well potential will be reflected by the quadrature squeezing of the light field.

关键词: Bose--Einstein Condensate, double-well potential, squeezing

Abstract: Squeezing via the interaction between the cavity light field and the Bose--Einstein Condensate (BEC) in a double-well potential is considered within the context of the two-mode approximation. For the cavity light field initially in a coherent state, it is shown that by choosing appropriate parameters, quadrature squeezing of the cavity light field can be achieved and it exhibits periodic oscillation. We also study the case in which BEC is tuned to resonance by periodically modulating the trapping potential, and the quadrature squeezing of the cavity field exhibits periodic collapse and revival effect. Both analytic and numerical calculations are performed, and they are found to be in good agreement with each other. The result shows that the quantum statistical properties of the cavity light field can be manipulated by its coupling with the condensates in the double-well potential. On the other hand, dynamical properties of the condensates in the double-well potential will be reflected by the quadrature squeezing of the light field.

Key words: Bose--Einstein Condensate, double-well potential, squeezing

中图分类号:  (Quantum state engineering and measurements)

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37.10.De (Atom cooling methods)