Hopping between localized Floquet states in periodically driven quantum dots

TL;DR

This paper investigates how weak electron-electron interactions in quantum dots cause hopping between Floquet states, leading to energy absorption and heating that eventually destroys dynamic localization.

Contribution

It introduces the effect of weak interactions on Floquet state localization and energy absorption in quantum dots, extending previous non-interacting models.

Findings

Weak interactions induce finite energy absorption and heating.

Heating rate increases with electronic temperature.

Localization is eventually destroyed by heating.

Abstract

The dynamic localization in energy space -- suppression of the absorption of energy from an external microwave field due to quantum interference -- was analyzed recently for a closed quantum dot in the absence of electron-electron interactions. Here a weak interaction is shown to lead to a finite absorption and heating, which may be viewed as hopping between localized Floquet states. The heating rate grows together with the electronic temperature, eventually destroying the localization.