1State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 1008762School of Science, Beijing University of Posts and Telecommunications, Beijing 1008763National Laboratory for Modern Communications, PO Box 810, Chengdu 610041
Multiparty Quantum Chatting Scheme
SUN Ying1,2;WEN Qiao-Yan1,2;ZHU Fu-Chen3
1State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 1008762School of Science, Beijing University of Posts and Telecommunications, Beijing 1008763National Laboratory for Modern Communications, PO Box 810, Chengdu 610041
摘要We propose a new multiparty simultaneous quantum direct communication scheme based on Green--Horne--Zeilinger (GHZ) states and dense coding. For achieving high efficiency without leaking any information, four encoding schemes are prepared in advance. The present scheme has the capacity of transmitting (M+1) M classical bits per group of M-particle GHZ states when there exist M parties. The technique of rearranging particles makes the legal users coequally exchange their messages in the same length. Both high efficiency and excellent security against the common attacks are virtues of this new scheme.
Abstract：We propose a new multiparty simultaneous quantum direct communication scheme based on Green--Horne--Zeilinger (GHZ) states and dense coding. For achieving high efficiency without leaking any information, four encoding schemes are prepared in advance. The present scheme has the capacity of transmitting (M+1) M classical bits per group of M-particle GHZ states when there exist M parties. The technique of rearranging particles makes the legal users coequally exchange their messages in the same length. Both high efficiency and excellent security against the common attacks are virtues of this new scheme.
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2008, Vol. 25 
