Gaussian quantum channels

Details Gaussian quantum channels Gaussian quantum channels

2005-05-20

arxiv.org/abs/quant-ph/0505151v1

Quantum Information with Continous Variables of Atoms and Light, pages 23-42 (Imperial College Press, London, 2007)

Physics

Quantum Physics

20 pages, LaTeX. Review article, previously unpublished material in Sections 3.3 and 5.4

Scientific paper

This article provides an elementary introduction to Gaussian channels and their capacities. We review results on the classical, quantum, and entanglement assisted capacities and discuss related entropic quantities as well as additivity issues. Some of the known results are extended. In particular, it is shown that the quantum conditional entropy is maximized by Gaussian states and that some implications for additivity problems can be extended to the Gaussian setting.

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