Regensburg 2022 – wissenschaftliches Programm

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SYED: Entanglement Distribution in Quantum Networks

SYED 1: Entanglement Distribution in Quantum Networks

SYED 1.5: Hauptvortrag

Mittwoch, 7. September 2022, 11:45–12:15, H1

Photonic cluster-state generation for memory-free quantum repeaters — •Tobias Huber — Lehrstuhl für Technische Physik, University of Würzburg, Würzburg, Germany

Many different hardware implementations show very promising results towards implementing quantum repeater nodes based on local memories [1]. While defects in diamond are currently the frontrunners, due to already demonstrated 3-node networks [2] and the possibility to enter the quantum repeater advantage regime (when comparing to direct links, considering losses at the given wavelength) [3], semiconductor quantum dots offer an intriguing alternative. Semiconductor quantum dots have the advantages of easy fabrication which leads to high device efficiencies. Furthermore, protocols for deterministic generation of linear photonic-cluster states do exist and have been already demonstrated experimentally [4]. With only moderate resource overhead a quantum repeater graph state can be fused from linear cluster states, opening the pathway towards memory-less 3rd generation quantum repeaters.

In this talk I will present our recent advances in device design and cluster-state generation with semiconductor quantum dots.

[1] van Loock et al. Adv. Quantum Technol. 3, 1900141 (2020)

[2] Pompili et al. Science 372, 259-264 (2021)

[3] Bhaskar et al. Nature 580, 60-64 (2020)

[4] Schwartz et al. Science 354, 434 (2016)