Clauser-Horne inequality for electron counting statistics in multiterminal mesoscopic conductors

Details Clauser-Horne inequality for electron counting statistics in multiterminal mesoscopic conductors Clauser-Horne inequality for electron counting statistics in multiterminal mesoscopic conductors

2003-06-30

arxiv.org/abs/cond-mat/0306733v3

Phys. Rev. B 69, 125326 (2004)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

26 pages, 9 figures. Ref. added

Scientific paper

10.1103/PhysRevB.69.125326

In this paper we derive the Clauser-Horne (CH) inequality for the full electron counting statistics in a mesoscopic multiterminal conductor and we discuss its properties. We first consider the idealized situation in which a flux of entangled electrons is generated by an entangler. Given a certain average number of incoming entangled electrons, the CH inequality can be evaluated for different numbers of transmitted particles. Strong violations occur when the number of transmitted charges on the two terminals is the same ($Q_1=Q_2$), whereas no violation is found for $Q_1\ne Q_2$. We then consider two actual setups that can be realized experimentally. The first one consists of a three terminal normal beam splitter and the second one of a hybrid superconducting structure. Interestingly, we find that the CH inequality is violated for the three terminal normal device. The maximum violation scales as 1/M and $1/M^2$ for the entangler and normal beam splitter, respectively, 2$M$ being the average number of injected electrons. As expected, we find full violation of the CH inequality in the case of the superconducting system.

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