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Phys. Rev. Lett. 100, 200407 (2008) [4 pages]

Discriminating Multipartite Entangled States

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Christian Schmid1,2, Nikolai Kiesel1,2, Wiesław Laskowski3, Witlef Wieczorek1,2, Marek Żukowski3, and Harald Weinfurter1,2
1Department für Physik, Ludwig-Maximilians-Universität, D-80797 München, Germany
2Max-Planck-Institut für Quantenoptik, D-85748 Garching, Germany
3Instytut Fizyki Teoretycznej i Astrofizyki, Uniwersytet Gdański, PL-80-952 Gdańsk, Poland

Received 3 January 2008; published 22 May 2008

The variety of multipartite entangled states enables numerous applications in novel quantum information tasks. In order to compare the suitability of different states from a theoretical point of view, classifications have been introduced. Accordingly, here we derive criteria and demonstrate how to experimentally discriminate an observed state against the ones of certain other classes of multipartite entangled states. Our method, originating in Bell inequalities, adds an important tool for the characterization of multiparty entanglement.

© 2008 The American Physical Society

URL:
http://link.aps.org/doi/10.1103/PhysRevLett.100.200407
DOI:
10.1103/PhysRevLett.100.200407
PACS:
03.65.Ud, 03.67.Mn, 42.50.Dv