Events

Seddik Ouacel presents

 Quantum interference with ultrashort voltage pulses

Wednesday, December 18th 2024 at 14:00

Seminar room – Building A – CNRS

Link visio: https://univ-grenoble-alpes-fr.zoom.us/j/94152769216?pwd=y3xxjfHfXBXdUw7n4GbZd8rbBmmKsR.1

The defence will be in French.

Abstract: This thesis investigates quantum coherence and interference in a 14 µm-long electronic Mach-Zehnder interferometer using ultrashort voltage pulses. We demonstrate, for the first time, coherence in the nonadiabatic regime where the drive frequency exceeds the characteristic timescale of the device, attributing its origin to the nonlinearity of our electronic beam splitter. In this regime, we achieve coherence with plasmonic excitations induced by pulses as short as 30 ps, demonstrating that we reach the few-electron regime with only a few electrons injected per pulse. These results represent a significant step toward the realization of a fully functional electronic flying qubit.