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Detection of multipartite entanglement with two-body correlations

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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.

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Author information

Authors and Affiliations

  1. Max-Planck-Institut für Quantenoptik, Hans-Kopfermann-Strasse 1, 85748, Garching, Germany

    G. Tóth

  2. Institut für Quantenoptik und Quanteninformation, Österreichische Akademie der Wissenschaften, 6020, Innsbruck, Austria

    O. Gühne

Authors
  1. G. Tóth
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  2. O. Gühne
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Correspondence to G. Tóth.

Additional information

PACS

03.65.Ud; 03.67.Mn; 05.50.+q

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Tóth, G., Gühne, O. Detection of multipartite entanglement with two-body correlations. Appl. Phys. B 82, 237–241 (2006). https://doi.org/10.1007/s00340-005-2057-1

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  • DOI: https://doi.org/10.1007/s00340-005-2057-1

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