Operational Interpretation for Global Multipartite Entanglement

S. Boixo and A. Monras
Phys. Rev. Lett. 100, 100503 – Published 14 March 2008

Abstract

We introduce an operational interpretation for pure-state global multipartite entanglement based on quantum estimation. We show that the estimation of the strength of low-noise locally depolarizing channels, as quantified by the regularized quantum Fisher information, is directly related to the Meyer-Wallach multipartite entanglement measure. Using channels that depolarize across different partitions, we obtain related multipartite entanglement measures. We show that this measure is the sum of expectation values of local observables on two copies of the state.

  • Figure
  • Received 27 June 2007

DOI:http://dx.doi.org/10.1103/PhysRevLett.100.100503

©2008 American Physical Society

Authors & Affiliations

S. Boixo1,2 and A. Monras3,*

  • 1Department of Physics and Astronomy, University of New Mexico, Albuquerque, New Mexico 87131, USA
  • 2Los Alamos National Laboratory, Los Alamos, New Mexico 87545, USA
  • 3Grup de Fisica Teòrica, Universitat Autònoma de Barcelona, Bellaterra, E-08193, Spain

  • *amonras@ifae.es

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Vol. 100, Iss. 10 — 14 March 2008

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