中国物理B ›› 2004, Vol. 13 ›› Issue (2): 147-152.doi: 10.1088/1009-1963/13/2/005

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Probabilistic remote state preparation by W states

刘金明, 王育竹   

  1. Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • 收稿日期:2003-07-03 修回日期:2003-08-25 出版日期:2004-02-06 发布日期:2005-07-06
  • 基金资助:
    Project supported by the China Postdoctoral Science Foundation, the National Natural Science Foundation of China (Grant Nos 10334050 and 10174086), the State Key Development Program for Basic Research of China (Grant No 2001CB309307), and the Knowledge In

Probabilistic remote state preparation by W states

Liu Jin-Ming (刘金明), Wang Yu-Zhu (王育竹)   

  1. Laboratory for Quantum Optics, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800, China
  • Received:2003-07-03 Revised:2003-08-25 Online:2004-02-06 Published:2005-07-06
  • Supported by:
    Project supported by the China Postdoctoral Science Foundation, the National Natural Science Foundation of China (Grant Nos 10334050 and 10174086), the State Key Development Program for Basic Research of China (Grant No 2001CB309307), and the Knowledge In

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摘要： In this paper we consider a scheme for probabilistic remote state preparation of a general qubit by using W states. The scheme consists of the sender, Alice, and two remote receivers Bob and Carol. Alice performs a projective measurement on her qubit in the basis spanned by the state she wants to prepare and its orthocomplement. This allows either Bob or Carol to reconstruct the state with finite success probability. It is shown that for some special ensembles of qubits, the remote state preparation scheme requires only two classical bits, unlike the case in the scheme of quantum teleportation where three classical bits are needed.

关键词: remote state preparation, W state, probabilistic, entanglement

Abstract: In this paper we consider a scheme for probabilistic remote state preparation of a general qubit by using W states. The scheme consists of the sender, Alice, and two remote receivers Bob and Carol. Alice performs a projective measurement on her qubit in the basis spanned by the state she wants to prepare and its orthocomplement. This allows either Bob or Carol to reconstruct the state with finite success probability. It is shown that for some special ensembles of qubits, the remote state preparation scheme requires only two classical bits, unlike the case in the scheme of quantum teleportation where three classical bits are needed.

Key words: remote state preparation, W state, probabilistic, entanglement

中图分类号:  (Entanglement and quantum nonlocality)

  • 03.65.Ud
03.67.Mn (Entanglement measures, witnesses, and other characterizations) 02.50.Cw (Probability theory)