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Chin. Phys. B, 2008, Vol. 17(1): 185-189    DOI: 10.1088/1674-1056/17/1/032
CLASSICAL AREAS OF PHENOMENOLOGY Prev   Next  

Influences of decoherence on the generation of a macroscopic superposition state using weak cross-Kerr effect

Wu Shao-Ping(吴少平), Zhang Li-Juan(张丽娟), and Li Gao-Xiang(李高翔)
Department of Physics, Huazhong Normal University, Wuhan 430079, China
Abstract  Considering a system in which a single photon and a coherent field propagate through a Kerr medium, when the weak cross-Kerr interaction between the coherent state and the single photon under decoherence is involved, this paper derives analytically a macroscopic superposition state by the superoperator method and investigates the influences of decoherence on the coherence properties of the obtained state. It finds that the macroscopic superposition state will experience evolution from a pure superposition state to a mixed state in a dissipative environment and the Kerr effect makes the field display a periodic revival from decoherence for a short time.
Keywords:  Kerr effect      superoperator      decoherence  
Accepted manuscript online: 
PACS:  42.65.Hw (Phase conjugation; photorefractive and Kerr effects)  
  42.50.Dv (Quantum state engineering and measurements)  
  42.50.Md (Optical transient phenomena: quantum beats, photon echo, free-induction decay, dephasings and revivals, optical nutation, and self-induced transparency)  
Fund: Project supported by the National Natural Science Foundation of China (Grant No 60478049) and the Natural Science Foundation of Hubei Province, China (Grant No 2006 ABB015).

Cite this article: 

Wu Shao-Ping(吴少平), Zhang Li-Juan(张丽娟), and Li Gao-Xiang(李高翔) Influences of decoherence on the generation of a macroscopic superposition state using weak cross-Kerr effect 2008 Chin. Phys. B 17 185

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