Physics – Quantum Physics
Scientific paper
2006-06-28
Physics
Quantum Physics
Scientific paper
We present a quantum secure direct communication protocol where the channels are not maximally entangled states. The communication parties utilize decoy photons to check eavesdropping. After ensuring the security of the quantum channel, the sender encodes the secret message and transmits it to the receiver by using Controlled-NOT operation and von Neumann measurement. The protocol is simple and realizable with present technology. We also show the protocol is secure for noisy quantum channel.
Tang Chao-jing
Wang Jian
Zhang Quan
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