Quantum Secure Direct Communication with Five-Qubit Entangled State
LIN Song1,2**, GAO Fei3, LIU Xiao-Fen1,2
1School of Mathematics and Computer Science, Fujian Normal University, Fuzhou 350007 2Key Lab of Network Security and Cryptography, Fujian Normal University, Fuzhou 350007 3State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876
Quantum Secure Direct Communication with Five-Qubit Entangled State
LIN Song1,2**, GAO Fei3, LIU Xiao-Fen1,2
1School of Mathematics and Computer Science, Fujian Normal University, Fuzhou 350007 2Key Lab of Network Security and Cryptography, Fujian Normal University, Fuzhou 350007 3State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications, Beijing 100876
摘要Recently, a genuine five-qubit entangled state has been achieved by Brown et al. [J. Phys. A 38 (2005) 1119]. Later it was indicated that this state can be used for quantum teleportation and quantum state sharing. Here we build a quantum secure direct communication protocol with this state, and prove that it is secure in ideal conditions. In the protocol, the sender performs unitary transformations to encode a secret message on his/her particles and sends them to the receiver. The receiver then performs projective determinate measurement to decode the secret message directly. Furthermore, this protocol utilizes superdense coding to achieve a high intrinsic efficiency and source capacity.
Abstract：Recently, a genuine five-qubit entangled state has been achieved by Brown et al. [J. Phys. A 38 (2005) 1119]. Later it was indicated that this state can be used for quantum teleportation and quantum state sharing. Here we build a quantum secure direct communication protocol with this state, and prove that it is secure in ideal conditions. In the protocol, the sender performs unitary transformations to encode a secret message on his/her particles and sends them to the receiver. The receiver then performs projective determinate measurement to decode the secret message directly. Furthermore, this protocol utilizes superdense coding to achieve a high intrinsic efficiency and source capacity.
LIN Song;**;GAO Fei;LIU Xiao-Fen;
. Quantum Secure Direct Communication with Five-Qubit Entangled State[J]. 中国物理快报, 2011, 28(3): 30302-030302.
LIN Song, **, GAO Fei, LIU Xiao-Fen,
. Quantum Secure Direct Communication with Five-Qubit Entangled State. Chin. Phys. Lett., 2011, 28(3): 30302-030302.
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2011, Vol. 28 
