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Bipartite entanglement measure based on covariance
KTH, School of Information and Communication Technology (ICT), Microelectronics and Applied Physics, MAP.ORCID iD: 0000-0002-2082-9583
2007 (English)In: Physical Review A. Atomic, Molecular, and Optical Physics, ISSN 1050-2947, E-ISSN 1094-1622, Vol. 75, no 6Article in journal (Refereed) Published
Abstract [en]

We propose an entanglement measure for two quNits based on the covariances of a set of generators of the su(N) algebra. In particular, we represent this measure in terms of the mutually unbiased projectors for N prime. For pure states this measure quantifies entanglement, we obtain an explicit expression which relates it to the concurrence hierarchy, specifically the I-concurrence and the three-concurrence. For mixed states we propose a separability criterion.

Place, publisher, year, edition, pages
2007. Vol. 75, no 6
Keyword [en]
mutually unbiased bases, state determination, separability, criterion, matrices, concurrence, dimensions
URN: urn:nbn:se:kth:diva-16734DOI: 10.1103/PhysRevA.75.062317ISI: 000247624300055ScopusID: 2-s2.0-34347329145OAI: diva2:334777
QC 20100525Available from: 2010-08-05 Created: 2010-08-05Bibliographically approved

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Björk, Gunnar
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Microelectronics and Applied Physics, MAP
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