Quantum secure direct communication network with superdense coding and decoy photons

Details Quantum secure direct communication network with superdense coding and decoy photons Quantum secure direct communication network with superdense coding and decoy photons

2006-05-25

arxiv.org/abs/quant-ph/0605214v2

Physcica Scripta 76 (2007) 25-30

Physics

Quantum Physics

6 pages, 2 figure

Scientific paper

A quantum secure direct communication network scheme is proposed with quantum superdense coding and decoy photons. The servers on a passive optical network prepare and measure the quantum signal, i.e., a sequence of the $d$-dimensional Bell states. After confirming the security of the photons received from the receiver, the sender codes his secret message on them directly. For preventing a dishonest server from eavesdropping, some decoy photons prepared by measuring one photon in the Bell states are used to replace some original photons. One of the users on the network can communicate any other one. This scheme has the advantage of high capacity, and it is more convenient than others as only a sequence of photons is transmitted in quantum line.

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