Detection of multipartite entanglement with two-body correlations

Details Detection of multipartite entanglement with two-body correlations Detection of multipartite entanglement with two-body correlations

2006-02-07

arxiv.org/abs/quant-ph/0602068v1

Appl. Phys. B 82, 237 (2006)

Physics

Quantum Physics

5 pages including 2 figures, LaTeX; for the proceedings of the DPG spring meeting, Berlin, March 2005

Scientific paper

10.1007/s00340-005-2057-1

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.

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