Memory effects in quantum channel discrimination
Quantum Physics
2009-12-21 v3
Abstract
We consider quantum-memory assisted protocols for discriminating quantum channels. We show that for optimal discrimination of memory channels, memory assisted protocols are needed. This leads to a new notion of distance for channels with memory. For optimal discrimination and estimation of sets of unitary channels memory-assisted protocols are not required.
Keywords
Cite
@article{arxiv.0803.3237,
title = {Memory effects in quantum channel discrimination},
author = {Giulio Chiribella and Giacomo M. D'Ariano and Paolo Perinotti},
journal= {arXiv preprint arXiv:0803.3237},
year = {2009}
}
Comments
4 pages, 2 figures, revtex4