Symmetries and dynamics in an AC-driven self-assembled quantum dot lens

TL;DR

This paper investigates the behavior of an electron in a self-assembled quantum dot under intense AC electric fields, revealing how field tuning affects energy localization and spectral features through a non-perturbative Floquet analysis.

Contribution

It introduces a comprehensive Floquet approach to analyze multi-level quantum dots under strong driving, extending beyond two-level models to include full spectral structures.

Findings

Dynamical localization depends on field intensity tuning.

Avoided crossings correlate with sideband spectral force.

Harmonic contributions are controllable via field parameters.

Abstract

Theoretical results for a single electron in multi-level system given by a lens-shape self-assembled quantum dot in the presence of an intense harmonic electric field are presented. A non-perturbative Floquet approach is used to study the dynamical localization of the particle when going beyond the two-level approach by introducing the full spectral level structure. It is discussed the role of the different quasi-energy sidebands as the parameters of the system change. It is found that the contribution of different drive harmonics is controlled by fine tuning of field intensity. It is also shown that avoided crossings in the quasi-energy spectrum are correlated with the spectral force of the sidebands and dynamical state localization.