Regensburg 2025 – wissenschaftliches Programm
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SYIS: Symposium Progress and Challenges in Modelling Electron-Phonon Interaction in Solids
SYIS 1: Progress and Challenges in Modelling Electron-Phonon Interaction in Solids
SYIS 1.5: Hauptvortrag
Dienstag, 18. März 2025, 11:45–12:15, H1
Phonon influence on (cooperative) photon emission from quantum dots — •Erik Gauger1, Julian Wiercinski1, and Moritz Cygorek2 — 1Institute of Photonics and Quantum Sciences, Heriot Watt University — 2Technische Universität Dortmund
Semiconductor quantum dots (QDs) provide an established on-demand single-photon source platform. Integrating such sources into quantum networks comes with the requirement of producing fundamentally indistinguishable photons, and the ability to generate and preserve coherence between different emitters.
The leading source of decoherence of solid state emitters such as quantum dots is typically their coupling to longitudinal acoustic lattice vibrations, as can be observed under coherent control experiments such as Rabi oscillations as well as in their emission resonance spectrum.
In this presentation, I will give an overview of our theoretical work on modelling, understanding, and mitigating the interaction between solid-state emitters and their vibrational environment, and how this interaction manifests in measurable signatures such as photon statistics and spectral properties.
With a view towards scaling up to networks of coupled emitters, a particular focus of this presentation will be our recent progress in understanding the interplay between collective light-matter coupling and phonon decoherence, by utilising intuitive and interpretable master equation approaches as well as state-of-the-art numerical process tensor methods. I will also make connections to experimental data for up to five quantum dots displaying signatures of cooperative behaviour.
Keywords: phonon-induced dephasing; cooperative emission; open quantum systems theory; self-assembled quantum dots; super radiance