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We present a theoretical analysis of the appearance of entanglement innon-interacting mesoscopic structures. Our setup involves two oppositelypolarized sources injecting electrons of opposite spin into the two incomingleads. The mixing of these polarized streams in an ideal four-channel beamsplitter produces two outgoing streams with particular tunable correlations. ABell inequality test involving cross-correlated spin-currents in opposite leadssignals the presence of spin-entanglement between particles propagating indifferent leads. We identify the role of fermionic statistics and projectivemeasurement in the generation of these spin-entangled electrons.Comment: 5 pages, 1 figur

Entanglement in mesoscopic structures: Role of projection