Optimizing entropy relative to a channel or a subalgebra

Details Optimizing entropy relative to a channel or a subalgebra Optimizing entropy relative to a channel or a subalgebra

1997-01-14

arxiv.org/abs/quant-ph/9701014v1

Open Sys. & Inf. Dyn. 5 (1998) 209-227

Physics

Quantum Physics

7 pages, latex, no figures. To be published in: Proceedings of the XXI International Colloquium on Group Theoretical Methods i

Scientific paper

After recalling definition, monotonicity, concavity, and continuity of a
channel's entropy with respect to a state (finite dimensional cases only), I
introduce the roof property, a convex analytic tool, and show its use in
treating an example. Full proofs and more examples will appear elsewhere. The
relation (a la Benatti) to accessible information is mentioned.

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