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ZTE Communications ›› 2013, Vol. 11 ›› Issue (3): 33-35.DOI: DOI:10.3939/j.issn.1673-5188.2013.03.005

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Reducible Discord in Generic Three-Qubit Pure W States

Zhengjun Xi1, Zhihui Li2 and Yongming Li1   

  1. 1.College of Computer Science, Shaanxi Normal University, Xi′an 710062, China;
    2.College of Mathematics & Information Science, Shaanxi Normal University, Xi′an 710062, China
  • 收稿日期:2013-07-28 出版日期:2013-09-25 发布日期:2013-09-25
  • 作者简介:Zhengjun Xi (xizhengjun@snnu.edu.cn) received his PhD in computer science from Shaanxi Normal University, Xi’an, China, in 2012. He is currently a lecturer in the College of Computer Science, Shaanxi Normal University. His research interests include quantum information theory and quantum computation. He has published more than 20 papers.

    Zhihui Li (lizhihui@snnu.edu.cn) received his PhD from Northwestern Polytechnical University, Xi’an, China, in 2002. She is currently a professor in the College of Mathematics and Information Science, Shaanxi Normal University. She has published more than 60 papers.

    Yongming Li (liyongm@snnu.edu.cn) received his PhD from Sichuan University, Chengdu, China, in 1996. He is currently a professor in the College of Computer Science, Shaanxi Normal University. His research interests include computation theory, fuzzy control theory, fuzzy automata theory, fuzzy and quantum logic, and topology over lattices. He has published more than 150 papers.
  • 基金资助:
    This work is supported by National Natural Science Foundation of China (NSFC) under Grant No. 11271237 and No. 61228305.

Reducible Discord in Generic Three-Qubit Pure W States

Zhengjun Xi1, Zhihui Li2 and Yongming Li1   

  1. 1.College of Computer Science, Shaanxi Normal University, Xi′an 710062, China;
    2.College of Mathematics & Information Science, Shaanxi Normal University, Xi′an 710062, China
  • Received:2013-07-28 Online:2013-09-25 Published:2013-09-25
  • About author:Zhengjun Xi (xizhengjun@snnu.edu.cn) received his PhD in computer science from Shaanxi Normal University, Xi’an, China, in 2012. He is currently a lecturer in the College of Computer Science, Shaanxi Normal University. His research interests include quantum information theory and quantum computation. He has published more than 20 papers.

    Zhihui Li (lizhihui@snnu.edu.cn) received his PhD from Northwestern Polytechnical University, Xi’an, China, in 2002. She is currently a professor in the College of Mathematics and Information Science, Shaanxi Normal University. She has published more than 60 papers.

    Yongming Li (liyongm@snnu.edu.cn) received his PhD from Sichuan University, Chengdu, China, in 1996. He is currently a professor in the College of Computer Science, Shaanxi Normal University. His research interests include computation theory, fuzzy control theory, fuzzy automata theory, fuzzy and quantum logic, and topology over lattices. He has published more than 150 papers.
  • Supported by:
    This work is supported by National Natural Science Foundation of China (NSFC) under Grant No. 11271237 and No. 61228305.

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摘要： Quantum discord is the most prominent of quantum correlations, but it does not have unique generalizations to the multipartite case. W states are especially useful for secure communication. In this paper, we propose that the quantum correlation in generic three-qubit pure W states can be given by the two-qubit discords of these states.

关键词: quantum discord, W state, quantum correlation

Abstract: Quantum discord is the most prominent of quantum correlations, but it does not have unique generalizations to the multipartite case. W states are especially useful for secure communication. In this paper, we propose that the quantum correlation in generic three-qubit pure W states can be given by the two-qubit discords of these states.

Key words: quantum discord, W state, quantum correlation