中国物理B ›› 2007, Vol. 16 ›› Issue (5): 1215-1219.doi: 10.1088/1009-1963/16/5/007

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One-step discrimination scheme on N-particle Greenberger--Horne--Zeilinger bases

刘翔1, 方卯发1, 汪新文2   

  1. (1)College of Physics and Information Science, Hunan Normal University, Changsha 410081, China; (2)Department of Electronic Engineering and Physics, Hunan University of \\Science and Engineering, Yongzhou 425100, China
  • 收稿日期:2006-08-08 修回日期:2006-10-01 出版日期:2007-05-20 发布日期:2007-05-20
  • 基金资助:
    Project supported by the Scientific Research Fund of Hunan Provincial Education Department, China (Grant No 06C354), the Natural Science Foundation of Hunan Province, China (Grant No 06JJ50015) and the fund from Hunan University of Science and Engineering

One-step discrimination scheme on N-particle Greenberger--Horne--Zeilinger bases

Wang Xin-Wen(汪新文)a)†, Liu Xiang(刘翔)b), and Fang Mao-Fa(方卯发)b)   

  1. a Department of Electronic Engineering and Physics, Hunan University of Science and Engineering, Yongzhou 425100, China; b College of Physics and Information Science, Hunan Normal University, Changsha 410081, China
  • Received:2006-08-08 Revised:2006-10-01 Online:2007-05-20 Published:2007-05-20
  • Supported by:
    Project supported by the Scientific Research Fund of Hunan Provincial Education Department, China (Grant No 06C354), the Natural Science Foundation of Hunan Province, China (Grant No 06JJ50015) and the fund from Hunan University of Science and Engineering

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摘要： We present an experimentally feasible one-step discrimination scheme on Bell bases with trapped ions, and then generalize it to the case of N-ion Greenberger--Horne--Zeilinger (GHZ) bases. In the scheme, all the orthogonal and complete N-ion GHZ internal states can be exactly discriminated only by one step, and thus it takes very short time. Moreover, the scheme is insensitive to thermal motion and dose not require the individual addressing of the ions. The Bell-state and GHZ-state one-step discrimination scheme can be widely used in quantum information processing based on ion-trap set-up.

关键词: Bell-state analyser, GHZ-state analyser, trapped ions, quantum information processing

Abstract: We present an experimentally feasible one-step discrimination scheme on Bell bases with trapped ions, and then generalize it to the case of N-ion Greenberger--Horne--Zeilinger (GHZ) bases. In the scheme, all the orthogonal and complete N-ion GHZ internal states can be exactly discriminated only by one step, and thus it takes very short time. Moreover, the scheme is insensitive to thermal motion and dose not require the individual addressing of the ions. The Bell-state and GHZ-state one-step discrimination scheme can be widely used in quantum information processing based on ion-trap set-up.

Key words: Bell-state analyser, GHZ-state analyser, trapped ions, quantum information processing

中图分类号:  (Entanglement and quantum nonlocality)

  • 03.65.Ud
03.67.-a (Quantum information)