中国物理B ›› 2008, Vol. 17 ›› Issue (10): 3725-3728.doi: 10.1088/1674-1056/17/10/032

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High efficient scheme for remote state preparation with cavity QED

邓 黎, 陈爱喜, 徐彦秋   

  1. Department of Applied Physics, East China Jiaotong University, Nanchang 330013, China
  • 收稿日期:2007-11-13 修回日期:2008-06-09 出版日期:2008-10-20 发布日期:2008-10-20
  • 基金资助:
    Project supported by the Natural Science Foundation of Jiangxi Province, China (Grant Nos 0612006 and 2007GZW0819), the Scientific Research Foundation of Jiangxi Provincial Department of Education, China (Grant No [2007]191), and Funds from East China Jiaotong University.

High efficient scheme for remote state preparation with cavity QED

Deng Li(邓黎), Chen Ai-Xi(陈爱喜)†, and Xu Yan-Qiu(徐彦秋)   

  1. Department of Applied Physics, East China Jiaotong University, Nanchang 330013, China
  • Received:2007-11-13 Revised:2008-06-09 Online:2008-10-20 Published:2008-10-20
  • Supported by:
    Project supported by the Natural Science Foundation of Jiangxi Province, China (Grant Nos 0612006 and 2007GZW0819), the Scientific Research Foundation of Jiangxi Provincial Department of Education, China (Grant No [2007]191), and Funds from East China Jiaotong University.

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摘要： In this paper, a scheme is proposed for remote state preparation (RSP) with cavity quantum electrodynamics (QED). In our scheme, two observers share two-atom nonmaximally entangled state as quantum channels and can realize remote preparation of state of an atom. We also propose a generalization for remote preparation of $N$-atom entangled state by ($N$+1)-atom {GHZ-like} state ($N \ge 2)$. By this scheme, one single-atom projective measurement is enough for the RSP of a qubit or $N$-atom entangled state, and the probability of success for RSP is unity. Furthermore, we have considered the case where observers use {W-like} state as quantum channels to realize RSP of a qubit. We compare our scheme with existing ones.

关键词: remote state preparation, cavity QED, entangled state

Abstract: In this paper, a scheme is proposed for remote state preparation (RSP) with cavity quantum electrodynamics (QED). In our scheme, two observers share two-atom nonmaximally entangled state as quantum channels and can realize remote preparation of state of an atom. We also propose a generalization for remote preparation of $N$-atom entangled state by ($N$+1)-atom GHZ-like state ($N \ge 2)$. By this scheme, one single-atom projective measurement is enough for the RSP of a qubit or $N$-atom entangled state, and the probability of success for RSP is unity. Furthermore, we have considered the case where observers use W-like state as quantum channels to realize RSP of a qubit. We compare our scheme with existing ones.

Key words: remote state preparation, cavity QED, entangled state

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

  • 42.50.Pq
03.65.Ud (Entanglement and quantum nonlocality) 42.50.Dv (Quantum state engineering and measurements) 03.67.Mn (Entanglement measures, witnesses, and other characterizations) 03.67.Lx (Quantum computation architectures and implementations)