Accessible information in quantum measurement

Details Accessible information in quantum measurement Accessible information in quantum measurement

1996-11-19

arxiv.org/abs/quant-ph/9611032v1

Physics

Quantum Physics

4 pages RevTeX with psfig, 3 figures

Scientific paper

The amount of information that can be accessed via measurement of a quantum system prepared in different states is limited by the Kholevo bound. We present a simple proof of this theorem and its extension to sequential measurements based on the properties of quantum conditional and mutual entropies. The proof relies on a minimal physical model of the measurement which does not assume environmental decoherence, and has an intuitive diagrammatic representation.

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