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Information gain in quantum continual measurements

Albert Barchielli, Giancarlo Lupieri

quant-pharXiv:quant-ph/0612010

Abstract

Inspired by works on information transmission through quantum channels, we propose the use of a couple of mutual entropies to quantify the efficiency of continual measurement schemes in extracting information on the measured quantum system. Properties of these measures of information are studied and bounds on them are derived.

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