Jeudi 07 novembre 2013 à 10h15
Salle 234, Ecole de Physique

Floquet Theory of Electron Waiting Times in Quantum-Coherent Conductors

David Dasenbrook, Université de Genève, Département de Physique Théorique

We present a Floquet scattering theory of electron waiting time distributions in periodically driven quantum conductors. We employ a second-quantized formulation that allows us to relate the waiting time distribution to the Floquet scattering matrix of the system. As an application we evaluate the electron waiting time for a periodically driven quantum point contact. A sequence of Lorentzian-shaped voltage pulses generates a train of levitons whose waiting time distribution is investigated. In addition we periodically modulate the transmission of the quantum point contact and ?find clear?ngerprints in the electron waiting times. The distributions of waiting times provide us with a detailed characterization of the dynamical properties of the quantum-coherent conductor.