Wydarzenia

Seminarium "Coherence-Correlations-Complexity" (KFT, PWr)

Self-assembled quantum dots and molecules: Phonon assisted quantum state preparation and exotic two-particle couplings

Per-Lennart Ardelt

Walter Schottky Institut, TU München

Over the past decades, self-assembled quantum dots in semiconductors, so called “artificial atoms”, have emerged as versatile systems for investigating quantum effects in tailored nanostructures. In strong contrast to real atoms, their individual morphology and their coupling to the solid state environment render quantum dots as complex systems, ideal to study the effects of single particle – bath interactions e.g. phonons or nuclear spins or deviations from idealized models arising from for example asymmetries. In this seminar, we will explore two of these effects: In the first part of the seminar will focus on how asymmetries in the quantum dot morphology can lead to the formation of exotic two-particle quantum couplings in coupled quantum dots and render a shell structure that is distinctively more complex than a simple atomistic model. In the second part, we will investigate the coupling of single localized quantum states to the solid state environment in the form of a phonon bath and demonstrate that the single particle – phonon bath interactions can actually be beneficial for high fidelity quantum state preparation.