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Quantum secure direct communication network with Einstein-Podolsky-Rosen pairs | | Fu-Guo Deng
; Xi-Han Li
; Chun-Yan Li
; Ping Zhou
; Hong-Yu Zhou
; | | Date: |
2 Aug 2005 | | Subject: | quant-ph | | Abstract: | We discuss the four requirements for a real quantum secure direct communication (QSDC) first, and then present an efficient QSDC network scheme with an $N$ ordered Einstein-Podolsky-Rosen (EPR) pairs. The server prepares and measures the EPR pairs in the quantum communication and the users exploit the four local unitary operations to encode their message. Any one of the authorized users can communicate another one on the network securely with the capability of single-photon measurements. The intrinsic efficiency and source capacity in this scheme are both high as almost all of the instances are useful and each EPR pair can be used to carry two bits of information. | | Source: | arXiv, quant-ph/0508015 | | Services: | Forum | Review | PDF | Favorites | |
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