Bell inequalities and entanglement in solid state devices
Mesoscale and Nanoscale Physics
2009-11-07 v3 Strongly Correlated Electrons
Quantum Physics
Abstract
Bell-inequality checks constitute a probe of entanglement -- given a source of entangled particles, their violation are a signature of the non-local nature of quantum mechanics. Here, we study a solid state device producing pairs of entangled electrons, a superconductor emitting Cooper pairs properly split into the two arms of a normal-metallic fork with the help of appropriate filters. We formulate Bell-type inequalities in terms of current-current cross-correlators, the natural quantities measured in mesoscopic physics; their violation provides evidence that this device indeed is a source of entangled electrons.
Cite
@article{arxiv.cond-mat/0112094,
title = {Bell inequalities and entanglement in solid state devices},
author = {Nikolai M. Chtchelkatchev and Gianni Blatter and Gordey B. Lesovik and Thierry Martin},
journal= {arXiv preprint arXiv:cond-mat/0112094},
year = {2009}
}
Comments
4 pages, 1 figure