paper

Orbital entanglement and violation of Bell inequalities in mesoscopic conductors

arXiv:cond-mat/0303531 · doi:10.1103/PhysRevLett.91.157002

Abstract

We propose a spin-independent scheme to generate and detect two-particle entanglement in a mesoscopic normal-superconductor system. A superconductor, weakly coupled to the normal conductor, generates an orbitally entangled state by injecting pairs of electrons into different leads of the normal conductor. The entanglement is detected via violation of a Bell inequality, formulated in terms of zero-frequency current cross-correlators. It is shown that the Bell inequality can be violated for arbitrary strong dephasing in the normal conductor.

4 pages, 2 figures

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