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Bipartite entanglement measure based on covariance
- Abascal, Isabel Sainz (author)
-
- Björk, Gunnar (author)
- KTH,Mikroelektronik och tillämpad fysik, MAP
- (creator_code:org_t)
- 2007
- 2007
- English.
- In: Physical Review A. Atomic, Molecular, and Optical Physics. - 1050-2947 .- 1094-1622. ; 75:6
- Journal article (peer-reviewed)
Abstract
Subject headings
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- 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.
Keyword
- mutually unbiased bases
- state determination
- separability
- criterion
- matrices
- concurrence
- dimensions
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- ref (subject category)
- art (subject category)
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