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HL: Fachverband Halbleiterphysik

HL 20: Focus Session: Young Semiconductor Forum

HL 20.4: Hauptvortrag

Dienstag, 19. März 2024, 11:15–11:45, EW 203

Advances in Quantum Light Generation for Quantum Communication — •Tobias Heindel — Institute for Solid State Physics, Technische Universität Berlin, 10623 Berlin, Germany

In this contribution, I will review advances in the generation of flying qubits from solid-state quantum emitters for implementations of quantum communication and networking [1,2]. One spotlight will be on the progress in the on-demand generation of single indistinguishable photons in the telecom C-band exploiting pulsed coherent pumping schemes. Prospects for further improvements are discussed. Moreover, the development of plug-&-play benchtop single-photon quantum key distribution (QKD) systems as well as the transfer to emerging quantum emitter platforms (e.g. 2D quantum materials) are highlighted. Not least, recent experiments towards the generation of multi-partite entangled states are presented, thereby building the bridge from fundamental quantum optics to applications in quantum information.

Many people contributed to this work, including my team members D. A. Vajner, L. Rickert, T. Gao, K. Kaymazlar, N. Kewitz, and M. von Helversen as well as the members of collaborating groups - I express my gratitude to all of them. Financial support by the German Federal Ministry of Education and Research (BMBF) via the Quantum Futur grant "QuSecure" and the BMBF joint project "tubLAN Q.0" as well as by the Einstein Foundation via the Einstein Research Unit "Quantum Devices" is acknowledged.
[1] Vajner et al., Advanced Quantum Technologies 5, 2100116 (2022) [2] Heindel et al., Advances in Optics and Photonics 15, 613 (2023)

Keywords: Quantum Lights Sources; Quantum Communication; Quantum Networks; Solid-State Quantum Optics; Quantum Technologies