Orbital Entanglement and Violation of Bell Inequalities in Mesoscopic Conductors
Peter Samuelsson, Eugene V. Sukhorukov, Μ. Büttiker
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.
arXiv:cond-mat/0303531•Physical Review Letters•Oct 9, 2003•239 citations