Two Ways of Robust Quantum Dialogue by Using Four-Qubit Cluster State

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• 作者：Rui-jin Wang ; Dong-fen Li ; Yao Liu…
• 关键词：Quantum information ; Quantum dialogue ; Bidirectional quantum quantum dialogue ; Bell ; state measurements
• 刊名：International Journal of Theoretical Physics
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：55
• 期：4
• 页码：2110-2124
• 全文大小：206 KB
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• 作者单位：Rui-jin Wang (1)
  Dong-fen Li (1)
  Yao Liu (1)
  Zhi-guang Qin (1)
  Edward Baagyere (1)
  
  1. School of Information and Software Engineering, University of Electronic Science and Technology of China, Chengdu, Sichuan, 610054, 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

In this paper, we present a scheme for quantum dialogue by using a four-qubit cluster state as quantum channel.The scheme has two cases: Case 1, Sender Alice and receiver Bob share information using an orderly sequence of entangled state as quantum channel which was prepared by Alice. This case is achieved as follows: The two sides agreed to encode quantum state information, then Alice perform a bell state measurement for quantum information which has been encoded. This will convey the information to Bob, then Bob measuring his own qubits, through the analysis of the measurement results of Alice and Bob, Bob can obtain quantum information. For case 2, four-qubit cluster state and quantum state information is transmitted to form a total quantum system. In the Case 2 scenario, Alice and Bob perform bell state measurements for part of the qubits, and tell the measurement result to each other through the classical channel. Finally, according to the measurement result, Alice and Bob operate an appropriate unitary transformation, as a result, Alice’s qubit will be renewed upon Bob’s measurements, and also, Bob’s qubit will be renewed upon Alice’s measurements. Thus, a bidirectional quantum dialogue is achieved. After analysis, this scheme has high security by taking certain eavesdropping attacks into account. There is therefore a certain reference value to the realization of quantum dialogue.