Regensburg 2022 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 8: Quantum Dots and Wires 2: Optics 1

HL 8.8: Vortrag

Montag, 5. September 2022, 17:30–17:45, H32

Dephasing mechanisms revealed by two-photon coincidence measurements — •Julian Wiercinski, Moritz Cygorek, and Erik M. Gauger — SUPA, Institute of Photonics and Quantum Sciences, Heriot-Watt University, Edinburgh, UK

Cooperative effects of entangled quantum emitters play a key role in quantum technologies like, e.g., quantum computing and are known to influence their light emission as well as absorption - a key ingredient for highly efficient quantum batteries and light harvesting complexes. Only recently, cooperative emission of two quantum dots has been observed experimentally.

Inspired by these results we use numerically complete methods to theoretically investigate the impact of different dephasing mechanisms on the cooperative emission of two quantum dots. We show that different dephasing mechanisms lead to severe qualitative differences in the two-photon coincidence signals. These can be explained by the influence of dephasing on the dynamics of the inter-emitter entanglement. Therefore, we argue, two-photon coincidence measurements make dephasing visible in the experiment acting as a probe for underlying dephasing mechanisms.