Dresden 2020 – wissenschaftliches Programm

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HL: Fachverband Halbleiterphysik

HL 39: Materials and devices for quantum technology II

HL 39.1: Hauptvortrag

Mittwoch, 18. März 2020, 09:30–10:00, POT 112

Quantum communication with entangled photons from quantum dots — •Rinaldo Trotta — Department of Physics, Sapienza University of Rome, Piazzale Aldo Moro 5, 00185 Rome, Italy

The prospect of using the quantum nature of light for secure quantum communication keeps spurring the search of quantum emitters capable of delivering entangled photons on-demand, with high quality, and efficiency. Despite recent advances, however, the exploitation of deterministic quantum light sources in advanced quantum communication protocols remains a major open challenge. In this talk, I will show that photons generated on-demand by quantum dots can be used to implement a teleportation protocol whose fidelity violates the classical limit for any arbitrary input states [1]. Moreover, I will present the first experimental demonstration of all-photonic entanglement swapping using pairs of entangled photons from a quantum dot [2]. A discussion on future perspectives and challenges will conclude the talk. [1] M. Reindl, et al., Sci. Adv. 4, eaau1255 (2018). [2] F. Basso Basset, et al., Phys. Rev. Lett. 123, 160501 (2019).