Regensburg 2022 – wissenschaftliches Programm

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SYED: Entanglement Distribution in Quantum Networks

SYED 1: Entanglement Distribution in Quantum Networks

SYED 1.2: Hauptvortrag

Mittwoch, 7. September 2022, 10:00–10:30, H1

Quantum key distribution with highly entangled photons from GaAs quantum dots — •Armando Rastelli, Santanu Manna, Saimon Covre da Silva, Gabriel Undeutsch, and Christian Schimpf — Institute of Semiconductor and Solid State Physics, Johannes Kepler Universität Linz, Linz, Austria

Entanglement is one of the most peculiar phenomena in quantum science and a key resource for quantum technologies. More than two decades after the initial proposal [1], semiconductor quantum dots (QDs) are now beginning to outperform other sources for the generation of entangled photon pairs. Among different material systems, QDs in the (Al)GaAs platform have demonstrated the highest degree of polarization entanglement to date together with other appealing features for quantum science and technology [2]. In this talk, we will discuss the properties of GaAs QDs obtained by the droplet etching method and present recent results relevant to their application in quantum communication, i.e. entanglement-based quantum key distribution [3,4], quantum teleportation and entanglement swapping.

References [1] O. Benson et al., Phys. Rev. Lett. 84, 2513*2516 (2000). [2] S. F. C. da Silva et al., Appl. Phys. Lett. 119, 120502 (2021). [3] C. Schimpf et al., Adv. Photonics 3, (2021). [4] C. Schimpf et al., Sci. Adv. 7, eabe8905 (2021).