The Quantum Cocktail Party

Details The Quantum Cocktail Party The Quantum Cocktail Party

2006-09-04

arxiv.org/abs/quant-ph/0609020v1

Physics

Quantum Physics

4 pages, 2figures, revtex4

Scientific paper

We consider the problem of decorrelating states of coupled quantum systems. The decorrelation can be seen as separation of quantum signals, in analogy to the classical problem of signal-separation rising in the so-called cocktail-party context. The separation of signals cannot be achieved perfectly, and we analyse the optimal decorrelation map in terms of added noise in the local separated states. Analytical results can be obtained both in the case of two-level quantum systems and for Gaussian states of harmonic oscillators.

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