Economical quantum secure direct communication network with single photons |
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Authors: | Deng Fu-Guo Li Xi-Han Li Chun-Yan Zhou Ping and Zhou Hong-Yu |
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Institution: | The Key Laboratory of Beam Technology and Material Modification of Ministry of Education,Beijing Normal University, Beijing 100875, China; Institute of Low Energy Nuclear Physics, and Department of Material Science and Engineering, Beijing Normal University, Beijing 100875, China |
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Abstract: | In this paper a scheme for quantum secure direct communication
(QSDC) network is proposed with a sequence of polarized single
photons. The single photons are prepared originally in the same
state $\vert 0\rangle$ by the servers on the network, which will
reduce the difficulty for the legitimate users to check
eavesdropping largely. The users code the information on the single
photons with two unitary operations which do not change their
measuring bases. Some decoy photons, which are produced by operating
the sample photons with a Hadamard, are used for preventing a
potentially dishonest server from eavesdropping the quantum lines
freely. This scheme is an economical one as it is the easiest way
for QSDC network communication securely. |
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Keywords: | quantum secure direct
communication network single photons |
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