Local and nonlocal entanglement for quasiparticle pairs induced by Andreev reflection
Mesoscale and Nanoscale Physics
2009-11-11 v1 Other Condensed Matter
Abstract
We investigate local and nonlocal entanglement of particle pairs induced by direct and crossed Andreev reflections at the interfaces between a superconductor and two normal conductors. It is shown theoretically that both local and nonlocal entanglement can be quantified by concurrence and detected from the violation of a Bell inequality of spin current correlators, which are determined only by normal reflection and Andreev reflection eigenvalues. There exists a one-to-one correspondence between the concurrence and the maximal Bell-CHSH parameter in the tunneling limit.
Keywords
Cite
@article{arxiv.cond-mat/0608469,
title = {Local and nonlocal entanglement for quasiparticle pairs induced by Andreev reflection},
author = {Zhao Yang Zeng and Liling Zhou and Jongbae Hong and Baowen Li},
journal= {arXiv preprint arXiv:cond-mat/0608469},
year = {2009}
}