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

doi:10.1088/1674-1056/17/1/032

中国物理B ›› 2008, Vol. 17 ›› Issue (1): 185-189.doi: 10.1088/1674-1056/17/1/032

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

吴少平, 张丽娟, 李高翔

Department of Physics, Huazhong Normal University, Wuhan 430079, China

出版日期:2008-01-20 发布日期:2008-01-20
基金资助:
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).

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

Online:2008-01-20 Published:2008-01-20
Supported by:
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).

摘要/Abstract

摘要： 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.

关键词: Kerr effect, superoperator, decoherence

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.

Key words: Kerr effect, superoperator, decoherence

中图分类号: (Phase conjugation; photorefractive and Kerr effects)

42.65.Hw

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)

吴少平, 张丽娟, 李高翔. Influences of decoherence on the generation of a macroscopic superposition state using weak cross-Kerr effect[J]. 中国物理B, 2008, 17(1): 185-189.

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[J]. Chin. Phys. B, 2008, 17(1): 185-189.

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

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

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