Compatibility of quantum states
Quantum Physics
2009-11-07 v1
Abstract
We introduce a measure of the compatibility between quantum states--the likelihood that two density matrices describe the same object. Our measure is motivated by two elementary requirements, which lead to a natural definition. We list some properties of this measure, and discuss its relation to the problem of combining two observers' states of knowledge.
Cite
@article{arxiv.quant-ph/0205033,
title = {Compatibility of quantum states},
author = {David Poulin and Robin Blume-Kohout},
journal= {arXiv preprint arXiv:quant-ph/0205033},
year = {2009}
}
Comments
4 pages, no figures