Quantum Secure Direct Communication Scheme in the Non-symmetric Channel with High Efficiency and Security

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• 作者：Zheng-Wen Cao ; Xiao-Yi Feng ; Jin-Ye Peng…
• 关键词：Quantum secure direct communication ; Quantum dense code ; Three ; particle W states ; Non ; symmetric channel ; Error rate
• 刊名：International Journal of Theoretical Physics
• 出版年：2015
• 出版时间：June 2015
• 年：2015
• 卷：54
• 期：6
• 页码：1871-1877
• 全文大小：138 KB
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• 作者单位：Zheng-Wen Cao (1) (2)
  Xiao-Yi Feng (1)
  Jin-Ye Peng (2)
  Gui-Hua Zeng (2)
  Xiao-Fei Qi (2)
  
  1. School of Electronics and Information, Northwestern Polytechnical University, Xi鈥檃n, 710072, China
  2. School of Information Science and Technology, Northwest University, Xi鈥檃n, 710127, China
  
• 刊物类别：Physics and Astronomy
• 刊物主题：Physics
  Physics
  Quantum Physics
  Elementary Particles and Quantum Field Theory
  Mathematical and Computational Physics
  
• 出版者：Springer Netherlands
• ISSN：1572-9575

文摘

By analyzing the basic properties of a class of three-particle W states, we show how to establish a non-symmetric channel to realize a quantum dense code scheme, each quantum pair can carry log₂ 18 bits of classical message by employing different kinds of unitary transformation in three-dimensional Hilbert space, which can improve the transmission efficiency of classical message. Based on this quantum dense code, we propose a novel quantum secure direct communication scheme. The security of the scheme is also discussed in detail, and the error rate for eavesdropper is 50 %.