中国物理B ›› 2010, Vol. 19 ›› Issue (4): 44203-044203.doi: 10.1088/1674-1056/19/4/044203

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Generation of any superposition of coherent states along a straight line via resonant atom－cavity interaction

郑仕标   

  1. Department of Physics and State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
  • 收稿日期:2009-06-24 修回日期:2009-07-05 出版日期:2010-04-15 发布日期:2010-04-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10674025) and the Doctoral Foundation of the Ministry of Education of China (Grant No.~20070386002).

Generation of any superposition of coherent states along a straight line via resonant atom－cavity interaction

Zheng Shi-Biao(郑仕标)†   

  1. Department of Physics and State Key Laboratory Breeding Base of Photocatalysis, Fuzhou University, Fuzhou 350002, China
  • Received:2009-06-24 Revised:2009-07-05 Online:2010-04-15 Published:2010-04-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10674025) and the Doctoral Foundation of the Ministry of Education of China (Grant No.~20070386002).

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摘要： This paper proposes a scheme for generating arbitrary superpositions of several coherent states along a straight line for a cavity mode. In the scheme, several atoms are sent through a cavity initially in a strong coherent state. The superposition of several coherent states with desired coefficients may be generated if each atom is detected in the excited state after it exits the cavity. The scheme is based on resonant atom--cavity interaction and no classical field is required during and after the atom--cavity interaction. Thus, the scheme is very simple and the interaction time is very short, which is important in view of decoherence.

Abstract: This paper proposes a scheme for generating arbitrary superpositions of several coherent states along a straight line for a cavity mode. In the scheme, several atoms are sent through a cavity initially in a strong coherent state. The superposition of several coherent states with desired coefficients may be generated if each atom is detected in the excited state after it exits the cavity. The scheme is based on resonant atom--cavity interaction and no classical field is required during and after the atom--cavity interaction. Thus, the scheme is very simple and the interaction time is very short, which is important in view of decoherence.

Key words: superposition of coherent states, cavity mode, resonant interaction

中图分类号:  (Cavity quantum electrodynamics; micromasers)

  • 42.50.Pq
32.80.-t (Photoionization and excitation)