Purification and correlated measurements of bipartite mixed states
Quantum Physics
2009-11-07 v1
Abstract
We prove that all purifications of a non-factorable state (i.e., the state which cannot be expressed in a form ) are entangled. We also show that for any bipartite state there exists a pair of measurements which are correlated on this state if and only if the state is non-factorable.
Keywords
Cite
@article{arxiv.quant-ph/0112015,
title = {Purification and correlated measurements of bipartite mixed states},
author = {Jan Bouda and Vladimir Buzek},
journal= {arXiv preprint arXiv:quant-ph/0112015},
year = {2009}
}
Comments
4 revtex pages, to appear in Phys. Rev. A