Emerging concepts in time-resolved quantum nanoelectronics

Orateur : Soutenance de Thèse de Benoit GAURY (CEA/INAC/SPSMS)

With the recent technical progress, single electron sources have moved from theory to the lab. Conceptually new types of experiments where one probes directly the internal quantum dynamics of the devices are within grasp. In this context we develop the analytical and numerical tools for handling such situations. In particular we show how to propagate electronic states while taking into account the statistical physics and the Pauli principle, in a way that is transparent for analytical calculations, and lightweight for numerical simulations. This formalism is used to demonstrate two concepts. The first one is the dynamical control of interference pattern. A time-dependent voltage is applied on a Fabry-Perot cavity and an electronic Mach-Zehnder interferometer to illustrate how one can control over time the interference pattern of various solid state interferometers. The second concept is the ability given by the quantum Hall regime to modify dynamically the path followed by the electrons in a quantum conductor. This effect will be exemplified by a procedure for stopping electrons in the bulk of a two-dimensional electron gas with radio-frequency pulses.

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