What bipartite states are lazy
arXiv:1402.0274 · doi:10.1007/s10773-014-2281-8
Abstract
A bipartite state is called lazy if the entropy rate of one subsystem is vanishing for any coupling to the other subsystem. In this paper, we provide a necessary and sufficient condition for a finite-dimensional bipartite state to be lazy, and prove that a two-mode Gaussian state is lazy if and only if it is a direct product state.
arXiv comment7 pages, no figure. With corrections to version 1
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