Characterization of multiqubit pure-state entanglement
Quantum Physics
2015-06-26 v2
Abstract
A necessary and sufficient entanglement criterion based on variances of Mermin-Klyshko's Bell operators is proved for multiqubit pure states. Contrary to Bell's inequalities, entangled pure states strictly satisfy a quadratic inequality but product ones can attain the equality under some local unitary transformations, which can be obtained by solving a quadratic maximum problem. This presents a characterization of multiqubit pure-state entanglement.
Cite
@article{arxiv.quant-ph/0505166,
title = {Characterization of multiqubit pure-state entanglement},
author = {Zeqian Chen and Quanhua Xu},
journal= {arXiv preprint arXiv:quant-ph/0505166},
year = {2015}
}
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3 pages