Robust excitation of C-band quantum dots for quantum communication
- Author(s)
- Michal Vyvlecka, Lennart Jehle, Cornelius Nawrath, Francesco Giorgino, Mathieu Bozzio, Robert Sittig, Michael Jetter, Simone L. Portalupi, Peter Michler, Philip Walther
- Abstract
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(s)
- Quantum Optics, Quantum Nanophysics and Quantum Information
- External organisation(s)
- Universität Stuttgart
- Journal
- Applied Physics Letters
- Volume
- 123
- No. of pages
- 7
- ISSN
- 0003-6951
- DOI
- https://doi.org/10.1063/5.0166285
- Publication date
- 10-2023
- Peer reviewed
- Yes
- Austrian Fields of Science 2012
- 103026 Quantum optics
- ASJC Scopus subject areas
- Physics and Astronomy (miscellaneous)
- Portal url
- https://ucris.univie.ac.at/portal/en/publications/robust-excitation-of-cband-quantum-dots-for-quantum-communication(446db9f2-d0fe-475b-95ef-6bfdfa8f49b9).html