Bipartite entanglement measure based on covariance
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
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
mutually unbiased bases, state determination, separability, criterion, matrices, concurrence, dimensions
IdentifiersURN: urn:nbn:se:kth:diva-16734DOI: 10.1103/PhysRevA.75.062317ISI: 000247624300055ScopusID: 2-s2.0-34347329145OAI: oai:DiVA.org:kth-16734DiVA: diva2:334777
QC 201005252010-08-052010-08-05Bibliographically approved