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Generation of bipartite spin entanglement via spin-independent scattering

AuthorsLamata, Lucas ; León, Juan
KeywordsQuantum entanglement
Bell theorem
Fermion systems
Information theory
Issue Date26-May-2006
PublisherAmerican Physical Society
CitationPhysical Review A 73(5): 052322 (2006)
AbstractWe consider the bipartite spin entanglement between two identical fermions generated in spin-independent scattering. We show how the spatial degrees of freedom act as ancillas for the creation of entanglement to a degree that depends on the scattering angle Θ. The number of Slater determinants generated in the process is greater than 1, corresponding to genuine quantum correlations between the identical fermions. The maximal entanglement attainable of 1 ebit is reached at Θ = π/2. We also analyze a simple Θ-dependent Bell's inequality, which is violated for π/4 < Θ ≤ π/2. This phenomenon is unrelated to the symmetrization postulate but does not appear for unequal particles.
Description4 pages, 3 figures.-- PACS nrs.: 03.67.Mn; 03.65.Ud.-- ArXiv pre-print available at: http://arxiv.org/abs/quant-ph/0602090
Publisher version (URL)http://dx.doi.org/10.1103/PhysRevA.73.052322
Appears in Collections:(CFMAC-IFF) Artículos
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