Regensburg 2004 – wissenschaftliches Programm

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SYSN: Quantum Shot Noise in Nanostructures

SYSN 1: Quantum Shot Noise in Nanostructures

SYSN 1.4: Vortrag

Montag, 8. März 2004, 15:00–15:15, H1

Electron counting statistics and the Clauser-Horne inequality — •Fabio Taddei¹, Lara Faoro², and Rosario Fazio¹ — ¹NEST-INFM & Scuola Normale Superiore, Pisa, Italy — ²ISI Foundation, Viale Settimio Severo, 65, I-10133 Torino, Italy

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 (Q₁=Q₂), whereas no violation is found for Q₁≠ Q₂. We then consider a three terminal normal beam splitter and a hybrid superconducting structure. Interestingly, we find that the CH inequality is violated for the three terminal normal device. As expected, we find full violation of the CH inequality in the case of the superconducting system.