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Orbital entanglement and violation of Bell inequalities in mesoscopic conductors
P Samuelsson1, E V Sukhorukov, M Büttiker
1Département de Physique Théorique, Université de Genève, CH-1211 Genève 4, Switzerland.
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.
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