The minimum entropy output of a quantum channel is locally additive

Details The minimum entropy output of a quantum channel is locally additive The minimum entropy output of a quantum channel is locally additive

2011-05-30

arxiv.org/abs/1105.6122v4

Physics

Quantum Physics

Shorter Version, further simplifications of proofs

Scientific paper

We show that the minimum von-Neumann entropy output of a quantum channel is
locally additive. Hasting's counterexample for the additivity conjecture, makes
this result quite surprising. In particular, it indicates that the
non-additivity of the minimum entropy output is a global effect of quantum
channels.

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