J. Eisert, M. M. Wolf
Published 2005-05-20Version 1
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.
Comments: 20 pages, LaTeX. Review article, previously unpublished material in Sections 3.3 and 5.4
Journal: Quantum Information with Continous Variables of Atoms and Light, pages 23-42 (Imperial College Press, London, 2007)
Exact non-Markovian dynamics of Gaussian quantum channels: Finite-time and asymptotic regimes
On quantum conditional entropies defined in terms of the $f$-divergences
Beyond Gaussian Quantum Channels: A model case
