One-mode Bosonic Gaussian channels: a full weak-degradability classification

Details One-mode Bosonic Gaussian channels: a full weak-degradability classification One-mode Bosonic Gaussian channels: a full weak-degradability classification

2006-09-03

arxiv.org/abs/quant-ph/0609013v2

New Journal of Physics 8, 310 (2006)

Physics

Quantum Physics

23 pages, 3 figures

Scientific paper

10.1088/1367-2630/8/12/310

A complete degradability analysis of one-mode Gaussian Bosonic channels is presented. We show that apart from the class of channels which are unitarily equivalent to the channels with additive classical noise, these maps can be characterized in terms of weak- and/or anti-degradability. Furthermore a new set of channels which have null quantum capacity is identified. This is done by exploiting the composition rules of one-mode Gaussian maps and the fact that anti-degradable channels can not be used to transfer quantum information.

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