Detection of multipartite entanglement with two-body correlations
Quantum Physics
2007-05-23 v1
Abstract
We show how to detect entanglement with criteria built from simple two-body correlation terms. Since many natural Hamiltonians are sums of such correlation terms, our ideas can be used to detect entanglement by energy measurement. Our criteria can straightforwardly be applied for detecting different forms of multipartite entanglement in familiar spin models in thermal equilibrium.
Keywords
Cite
@article{arxiv.quant-ph/0602068,
title = {Detection of multipartite entanglement with two-body correlations},
author = {Geza Toth and Otfried Gühne},
journal= {arXiv preprint arXiv:quant-ph/0602068},
year = {2007}
}
Comments
5 pages including 2 figures, LaTeX; for the proceedings of the DPG spring meeting, Berlin, March 2005