Quantum Secure Direct Communication with Five-Qubit Entangled State

LIN Song; GAO Fei; LIU Xiao-Fen

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Quantum Secure Direct Communication with Five-Qubit Entangled State

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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.Fhrthermore, this protocol utilizes superdense coding to achieve a high intrinsic efficiency and source capacity.

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《中国物理快报：英文版》 |2011年第3期|17-20|共4页
作者
LIN Song; GAO Fei; LIU Xiao-Fen;
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School of Mathematics and Computer Science, Fujian Normal University, Fuzhou,350007;

Key Lab of Network Security and Cryptography, Fujian Normal University, Fuzhou,350007;

State Key Laboratory of Networking and Switching Technology, Beijing University of Posts and Telecommunications,Beijing,100876;

School of Mathematics and Computer Science, Fujian Normal University, Fuzhou,350007;

Key Lab of Network Security and Cryptography, Fujian Normal University, Fuzhou,350007;

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Quantum Secure Direct Communication with Five-Qubit Entangled State

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