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arXiv:quant-ph/0508015 · Physics Letters A

Quantum secure direct communication network with Einstein–Podolsky–Rosen pairs

Fu‐Guo Deng, Xihan Li, Chunyan Li, Ping Zhou, Hong-Yu Zhou

Published Jun 29, 2006• 163 citations
arXivHTMLPDF
DOI
10.1016/j.physleta.2006.06.054

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In this paper, we present a multi-partner communication network protocol. The supervisor prepares numerous Einstein–Podolsky–Rosen (EPR) pairs and auxiliary qubits. He then performs a controlled-NOT(CNOT) gate operation on one qubit of each EPR pair and an auxiliary, which induces the entanglement between the EPR pair and the auxiliary. The supervisor keeps one qubit sequence in his laboratory and sends the others to the outside world. After security approval, the network can be constructed successfully, which can be applied to quantum secret sharing and quantum secure direct communication.