Teleportation of entangled states and dense coding using a multiparticle quantum channel

Details Teleportation of entangled states and dense coding using a multiparticle quantum channel Teleportation of entangled states and dense coding using a multiparticle quantum channel

2000-11-30

arxiv.org/abs/quant-ph/0011124v2

Physics

Quantum Physics

10 pages, latex, a topic on capacity is added, stylistic improvements, conclusions and results unchanged

Scientific paper

A set of protocols for teleportation and dense coding tasks with the use of a N particle quantum channel, presented by entangled states of the GHZ class, is introduced, when N>2. Using a found representation for the multiparticle entangled states of the GHZ class, it has shown, that for dense coding schemes enhancement of the classical capacity of the channel due from entanglement is N/N-1. If N>2 there is no one - to -one correspondence between teleportation and dense coding schemes in comparison with 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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