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Geometric measure for entanglement in N-qudit pure states

Source: Phys. Rev. A 80, 042302 (2009); doi:10.1103/PhysRevA.80.042302

Published 1 October 2009

KEYWORDS and PACS
Keywords
PACS
  • 03.67.Mn
    Entanglement measures, witnesses, and other characterizations (quantum information)
  • 03.65.Ca
    Formalism in quantum mechanics
  • 03.65.Ud
    Entanglement and quantum nonlocality
  • YEAR: 2009
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PUBLICATION DATA
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Ali Saif M. Hassan and Pramod S. Joag
Department of Physics, University of Pune, Pune 411007, India
We present a multipartite entanglement measure for N-qudit pure states, using the norm of the correlation tensor which occurs in the Bloch representation of the state. We compute this measure for an important class of N-qutrit pure states, namely, general GHZ states. We prove that this measure possesses all the essential and many desirable properties expected of a good entanglement measure, including monotonicity. We also discuss the feasibility of the experimental evaluation of this measure for an N-qutrit system. ©2009 The American Physical Society
History: Received 13 June 2009; published 1 October 2009
Permalink: http://link.aps.org/abstract/PRA/v80/e042302

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