Ore 15.00
Aula Seminari "U. M. Grassano"
Markus Buttiker (University of Geneva)
"Quantum correlations in mesoscopic conductors"
Abstract:
Mesoscopic physics is concerned with effects in which the wave nature of electrons appears. Theory predicted persistent currents and Aharonov-Bohm oscillations in the resistance of small structures. Experiments confirmed these predictions and led to the discovery of universal conductance fluctuations. For now almost a decade novel efforts were directed at quantum correlations that could violate a Bell inequality. We discuss two particle interferometers which exclude single particle interference but which exhibit nevertheless shot noise which is a periodic function of the Aharonov-Bohm flux. Instead of injecting electrons from equilibrium metallic contacts there are now novel sources which permit injection of single particles. Using two single particle emitters we discuss the analog of the Hong-Ou-Mandel two-particle interferometer, a two particle injector, a two-particle collider and a dynamical two-particle Aharonov-Bohm effect.
Invitato dal Prof. Matteo Cirillo