中国物理B ›› 2011, Vol. 20 ›› Issue (1): 10307-010307.doi: 10.1088/1674-1056/20/1/010307

• GENERAL • 上一篇    下一篇

Deterministically distinguishing a remote Bell state

赵志国, 彭卫民, 谭勇刚   

  1. Physics and Information Engineering Department, Luoyang Normal College, Luoyang 471022, China
  • 收稿日期:2010-06-21 修回日期:2010-08-10 出版日期:2011-01-15 发布日期:2011-01-15
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 10905028).

Deterministically distinguishing a remote Bell state

Zhao Zhi-Guo(赵志国), Peng Wei-Min(彭卫民), and Tan Yong-Gang(谭勇刚)†   

  1. Physics and Information Engineering Department, Luoyang Normal College, Luoyang 471022, China
  • Received:2010-06-21 Revised:2010-08-10 Online:2011-01-15 Published:2011-01-15
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 10905028).

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摘要： It has been proven that, with a single copy provided, the four Bell states cannot be distinguished by local operations and classical communications (LOCC). Traditionally, a Bell basis projective measurement is needed to distinguish the four Bell states, which is usually carried out with a local interference between two particles. This paper presents an interesting protocol that allows two remote parties to distinguish four Bell states deterministically. We prove that our protocol of distinguishing remote Bell states is beyond LOCC.

Abstract: It has been proven that, with a single copy provided, the four Bell states cannot be distinguished by local operations and classical communications (LOCC). Traditionally, a Bell basis projective measurement is needed to distinguish the four Bell states, which is usually carried out with a local interference between two particles. This paper presents an interesting protocol that allows two remote parties to distinguish four Bell states deterministically. We prove that our protocol of distinguishing remote Bell states is beyond LOCC.

Key words: Bell basis measurement, LOCC, distinguishability

中图分类号:  (Quantum cryptography and communication security)

  • 03.67.Dd
42.50.Dv (Quantum state engineering and measurements)