Orbital entanglement and violation of Bell inequalities in mesoscopic conductors

Details Orbital entanglement and violation of Bell inequalities in mesoscopic conductors Orbital entanglement and violation of Bell inequalities in mesoscopic conductors

2003-03-25

arxiv.org/abs/cond-mat/0303531v1

Phys. Rev. Lett. 91, 157002 (2003)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.91.157002

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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