中国物理B ›› 2013, Vol. 22 ›› Issue (10): 100308-100308.doi: 10.1088/1674-1056/22/10/100308

• GENERAL • 上一篇    下一篇

Generation of steady four-atom decoherence-free states via quantum-jump-based feedback

吴奇成, 计新   

  1. Department of Physics, College of Science, Yanbian University, Yanji 133002, China
  • 收稿日期:2013-02-28 修回日期:2013-04-10 出版日期:2013-08-30 发布日期:2013-08-30
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11064016 and 61068001).

Generation of steady four-atom decoherence-free states via quantum-jump-based feedback

Wu Qi-Cheng (吴奇成), Ji Xin (计新)   

  1. Department of Physics, College of Science, Yanbian University, Yanji 133002, China
  • Received:2013-02-28 Revised:2013-04-10 Online:2013-08-30 Published:2013-08-30
  • Contact: Ji Xin E-mail:jixin@ybu.edu.cn
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant Nos. 11064016 and 61068001).

摘要: A scheme is presented for generating steady four-atom decoherence-free states via four atoms with the Raman level configuration interacting with a single-mode vacuum cavity field by using quantum-jump-based feedback. The scheme meets the condition of a strongly dissipative cavity easily and has a simplified feedback control. Although the spontaneous emission still plays a negative role in the proposed system, we can improve the feedback control to reduce its effect.

关键词: Raman three-level atom, large detuning, four-atom decoherence-free state, quantum-jump-based feedback

Abstract: A scheme is presented for generating steady four-atom decoherence-free states via four atoms with the Raman level configuration interacting with a single-mode vacuum cavity field by using quantum-jump-based feedback. The scheme meets the condition of a strongly dissipative cavity easily and has a simplified feedback control. Although the spontaneous emission still plays a negative role in the proposed system, we can improve the feedback control to reduce its effect.

Key words: Raman three-level atom, large detuning, four-atom decoherence-free state, quantum-jump-based feedback

中图分类号:  (Entanglement production and manipulation)

  • 03.67.Bg
03.65.Yz (Decoherence; open systems; quantum statistical methods) 42.50.Lc (Quantum fluctuations, quantum noise, and quantum jumps) 42.50.Pq (Cavity quantum electrodynamics; micromasers)