Robust excitation of C-band quantum dots for quantum communication

Autor(en)

Michal Vyvlecka, Lennart Jehle, Cornelius Nawrath, Francesco Giorgino, Mathieu Bozzio, Robert Sittig, Michael Jetter, Simone L. Portalupi, Peter Michler, Philip Walther

Abstrakt

Building a quantum internet requires efficient and reliable quantum hardware, from photonic sources to quantum repeaters and detectors, ideally operating at telecommunication wavelengths. Thanks to their high brightness and single-photon purity, quantum dot (QD) sources hold the promise to achieve high communication rates for quantum-secured network applications. Furthermore, it was recently shown that excitation schemes such as longitudinal acoustic phonon-assisted (LA) pumping provide security benefits by scrambling the coherence between the emitted photon-number states. In this work, we investigate further advantages of LA-pumped quantum dots with emission in the telecom C-band as a core hardware component of the quantum internet. We experimentally demonstrate how varying the pump power and spectral detuning with respect to the excitonic transition can improve quantum-secured communication rates and provide stable emission statistics regardless of network-environment fluctuations. These findings have significant implications for general implementations of QD single-photon sources in practical quantum communication networks.

Organisation(en)

Quantenoptik, Quantennanophysik und Quanteninformation

Externe Organisation(en)

Universität Stuttgart

Journal

Applied Physics Letters

Band

123

Anzahl der Seiten

7

ISSN

0003-6951

DOI

https://doi.org/10.1063/5.0166285

Publikationsdatum

10-2023

Peer-reviewed

Ja

ÖFOS 2012

103026 Quantenoptik

ASJC Scopus Sachgebiete

Physics and Astronomy (miscellaneous)

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/446db9f2-d0fe-475b-95ef-6bfdfa8f49b9