Charge transfer statistics and entanglement in normal-quantum dot-superconductor hybrid structures

Details Charge transfer statistics and entanglement in normal-quantum dot-superconductor hybrid structures Charge transfer statistics and entanglement in normal-quantum dot-superconductor hybrid structures

2010-10-06

arxiv.org/abs/1010.1137v2

Eur. Phys. J. D. 63, 3-8 (2011)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

6 pages, 3 figures, typos fixed, references added

Scientific paper

10.1140/epjd/e2010-00256-7

We analyze the full counting statistics (FCS) of a single-site quantum dot coupled to multiple metallic electrodes in the normal state and a superconductor for arbitrary transmission. We present an analytical solution of the problem taking into account the full energy dependence of the transmission coefficient. We identify two transport processes as sources of entanglement between the current carriers by observing positive cross current correlations. Furthermore, we consider ferromagnetic electrodes and show how they can be used as detectors in experiments violating the Bell-Clauser-Horne-Shimony-Holt inequality.

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