High-rate intercity quantum key distribution with a semiconductor single-photon source

Research output: Contribution to journalArticleResearchpeer review

Authors

  • Jingzhong Yang
  • Zenghui Jiang
  • Frederik Benthin
  • Joscha Hanel
  • Tom Fandrich
  • Raphael Joos
  • Stephanie Bauer
  • Sascha Kolatschek
  • Ali Hreibi
  • Eddy Patrick Rugeramigabo
  • Michael Jetter
  • Simone Luca Portalupi
  • Michael Zopf
  • Peter Michler
  • Stefan Kück
  • Fei Ding
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Details

Original languageEnglish
Article number150
Number of pages10
JournalLight: Science and Applications
Volume13
Issue number1
Early online date2 Jul 2024
Publication statusE-pub ahead of print - 2 Jul 2024

Abstract

Quantum key distribution (QKD) enables the transmission of information that is secure against general attacks by eavesdroppers. The use of on-demand quantum light sources in QKD protocols is expected to help improve security and maximum tolerable loss. Semiconductor quantum dots (QDs) are a promising building block for quantum communication applications because of the deterministic emission of single photons with high brightness and low multiphoton contribution. Here we report on the first intercity QKD experiment using a bright deterministic single photon source. A BB84 protocol based on polarisation encoding is realised using the high-rate single photons in the telecommunication C-band emitted from a semiconductor QD embedded in a circular Bragg grating structure. Utilising the 79 km long link with 25.49 dB loss (equivalent to 130 km for the direct-connected optical fibre) between the German cities of Hannover and Braunschweig, a record-high secret key bits per pulse of 4.8 × 10−5 with an average quantum bit error ratio of ~ 0.65% are demonstrated. An asymptotic maximum tolerable loss of 28.11 dB is found, corresponding to a length of 144 km of standard telecommunication fibre. Deterministic semiconductor sources therefore challenge state-of-the-art QKD protocols and have the potential to excel in measurement device independent protocols and quantum repeater applications.

ASJC Scopus subject areas

Cite this

High-rate intercity quantum key distribution with a semiconductor single-photon source. / Yang, Jingzhong; Jiang, Zenghui; Benthin, Frederik et al.
In: Light: Science and Applications, Vol. 13, No. 1, 150, 12.2024.

Research output: Contribution to journalArticleResearchpeer review

Yang, J, Jiang, Z, Benthin, F, Hanel, J, Fandrich, T, Joos, R, Bauer, S, Kolatschek, S, Hreibi, A, Rugeramigabo, EP, Jetter, M, Portalupi, SL, Zopf, M, Michler, P, Kück, S & Ding, F 2024, 'High-rate intercity quantum key distribution with a semiconductor single-photon source', Light: Science and Applications, vol. 13, no. 1, 150. https://doi.org/10.1038/s41377-024-01488-0
Yang, J., Jiang, Z., Benthin, F., Hanel, J., Fandrich, T., Joos, R., Bauer, S., Kolatschek, S., Hreibi, A., Rugeramigabo, E. P., Jetter, M., Portalupi, S. L., Zopf, M., Michler, P., Kück, S., & Ding, F. (2024). High-rate intercity quantum key distribution with a semiconductor single-photon source. Light: Science and Applications, 13(1), Article 150. Advance online publication. https://doi.org/10.1038/s41377-024-01488-0
Yang J, Jiang Z, Benthin F, Hanel J, Fandrich T, Joos R et al. High-rate intercity quantum key distribution with a semiconductor single-photon source. Light: Science and Applications. 2024 Dec;13(1):150. Epub 2024 Jul 2. doi: 10.1038/s41377-024-01488-0
Yang, Jingzhong ; Jiang, Zenghui ; Benthin, Frederik et al. / High-rate intercity quantum key distribution with a semiconductor single-photon source. In: Light: Science and Applications. 2024 ; Vol. 13, No. 1.
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AU - Joos, Raphael

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