Probabilistic exact cloning and probabilistic no-signalling

Details Probabilistic exact cloning and probabilistic no-signalling Probabilistic exact cloning and probabilistic no-signalling

1999-08-04

arxiv.org/abs/quant-ph/9908017v2

Physics

Quantum Physics

Latex file, 6 pages, minor corrections

Scientific paper

10.1016/S0375-9601(00)00281-4

We show that non-local resources cannot be used for probabilistic signalling even if one can produce exact clones with the help of a probabilistic quantum cloning machine (PQCM). We show that PQCM cannot help to distinguish two statistical mixtures at a remote location. Thus quantum theory rules out the possibility of sending superluminal signals not only deterministically but also probabilistically. We give a bound on the success probability of producing multiple clones in an entangled system.

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