Quantum correlations and secret bits

Details Quantum correlations and secret bits Quantum correlations and secret bits

2003-10-08

arxiv.org/abs/quant-ph/0310054v3

Phys. Rev. Lett. 94, 020501 (2005)

Physics

Quantum Physics

4 pages, published version

Scientific paper

10.1103/PhysRevLett.94.020501

It is shown that (i) all entangled states can be mapped by single-copy measurements into probability distributions containing secret correlations, and (ii) if a probability distribution obtained from a quantum state contains secret correlations, then this state has to be entangled. These results prove the existence of a two-way connection between secret and quantum correlations in the process of preparation. They also imply that either it is possible to map any bound entangled state into a distillable probability distribution or bipartite bound information exists.

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