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Proceedings of SPIE, the International Society for Optical Engineering/Proceedings of SPIE

Multiparticle quantum channels based on the GHZ and W states

В. Н. Горбачев, Anatoly I. Jiliba, A. A. Rodichkina, Andrew I. Trubilko

Published Apr 20, 2004• 3 citations
Publisher

Abstract

A set of protocols for teleportation of entangled states and multiqubits dense coding using quantum channels of the GHZ and W type are considered.© (2004) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
DOI
10.1117/12.562264

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A set of protocols for teleportation and dense coding schemes based on a multiparticle quantum channel, represented by the NNN-particle entangled states of the GHZ class, is introduced. Using a found representation for the GHZ states, it was shown that for dense coding schemes enhancement of the classical capacity of the channel due from entanglement is N/N−1N/N-1N/N−1. Within the context of our schemes it becomes clear that there is no one-to one correspondence between teleportation and dense coding schemes in comparison when the EPR channel is exploited. A set of schemes, for which two additional operations as entanglement and disentanglement are permitted, is considered.
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