中国物理B ›› 2009, Vol. 18 ›› Issue (9): 3844-3849.doi: 10.1088/1674-1056/18/9/038

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Dynamical instability and adiabatic evolution of the atom--homonuclear--trimer dark state in a condensate system

吴炜1, 刘彬2, 叶地发2, 孟少英3, 傅立斌4   

  1. (1)Department of Physics, Municipal Key Laboratory of Photoelectronic Devices and Detection Technology, Liaoning University, Shenyang 110036, China; (2)Graduate School, China Academy of Engineering Physics, Beijing 100088, China; (3)Graduate School, China Academy of Engineering Physics, Beijing 100088, China;Department of Physics, Municipal Key Laboratory of Photoelectronic Devices and Detection Technology, Liaoning University, Shenyang 110036, China; (4)Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • 收稿日期:2009-01-08 修回日期:2009-01-13 出版日期:2009-09-20 发布日期:2009-09-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10674174, 10604009 and 10725521), the National Fundamental Research Programme of China (Grant No 2006CB921400 and 2007CB814800) and Natural Science Foundation of Liaoning Province of China (Grant No 20072054).

Dynamical instability and adiabatic evolution of the atom--homonuclear--trimer dark state in a condensate system

Meng Shao-Ying(孟少英)a)b), Wu Wei(吴炜)b), Liu Bin(刘彬)a), Ye Di-Fa(叶地发)a), and Fu Li-Bin(傅立斌)c)†   

  1. a Graduate School, China Academy of Engineering Physics, Beijing 100088, China; b Department of Physics, Municipal Key Laboratory of Photoelectronic Devices and Detection Technology, Liaoning University, Shenyang 110036, China; c Institute of Applied Physics and Computational Mathematics, Beijing 100088, China
  • Received:2009-01-08 Revised:2009-01-13 Online:2009-09-20 Published:2009-09-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos 10674174, 10604009 and 10725521), the National Fundamental Research Programme of China (Grant No 2006CB921400 and 2007CB814800) and Natural Science Foundation of Liaoning Province of China (Grant No 20072054).

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摘要： This paper investigates the dynamical instability and adiabatic evolution of the atom--homonuclear--trimer dark state of a condensate system in a stimulated Raman adiabatic passage aided by Feshbach resonance. It obtains analytically the regions for the appearance of dynamical instability caused by the interparticle interactions. Moreover, the adiabatic property of the dark state is also studied in terms of a newly defined adiabatic fidelity. It shows that the nonlinear collisions have a negative effect on the adiabaticity of the dark state and hence reduce the conversion efficiency.

Abstract: This paper investigates the dynamical instability and adiabatic evolution of the atom--homonuclear--trimer dark state of a condensate system in a stimulated Raman adiabatic passage aided by Feshbach resonance. It obtains analytically the regions for the appearance of dynamical instability caused by the interparticle interactions. Moreover, the adiabatic property of the dark state is also studied in terms of a newly defined adiabatic fidelity. It shows that the nonlinear collisions have a negative effect on the adiabaticity of the dark state and hence reduce the conversion efficiency.

Key words: stimulated Raman adiabatic passage, dark state, dynamical instability, adiabatic evolution

中图分类号:  (Atom cooling methods)

  • 37.10.De
03.75.Nt (Other Bose-Einstein condensation phenomena) 42.65.Dr (Stimulated Raman scattering; CARS)