Free space quantum key distribution over 500 meters using electrically driven quantum dot single-photon sources-a proof of principle experiment

Please always quote using this URN: urn:nbn:de:bvb:20-opus-116760
  • Highly efficient single-photon sources (SPS) can increase the secure key rate of quantum key distribution (QKD) systems compared to conventional attenuated laser systems. Here we report on a free space QKD test using an electrically driven quantum dot single-photon source (QD SPS) that does not require a separate laser setup for optical pumping and thus allows for a simple and compact SPS QKD system. We describe its implementation in our 500 m free space QKD system in downtown Munich. Emulating a BB84 protocol operating at a repetition rate ofHighly efficient single-photon sources (SPS) can increase the secure key rate of quantum key distribution (QKD) systems compared to conventional attenuated laser systems. Here we report on a free space QKD test using an electrically driven quantum dot single-photon source (QD SPS) that does not require a separate laser setup for optical pumping and thus allows for a simple and compact SPS QKD system. We describe its implementation in our 500 m free space QKD system in downtown Munich. Emulating a BB84 protocol operating at a repetition rate of 125 MHz, we could achieve sifted key rates of 5-17 kHz with error ratios of 6-9% and g((2))(0)-values of 0.39-0.76.show moreshow less

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Metadaten
Author: Markus Rau, Tobias Heindel, Sebastian Unsleber, Tristan Braun, Julian Fischer, Stefan Frick, Sebastian Nauerth, Christian Schneider, Gwenaelle Vest, Stephan Reitzenstein, Martin Kamp, Alfred Forchel, Sven Höfling, Harald Weinfurter
URN:urn:nbn:de:bvb:20-opus-116760
Document Type:Journal article
Faculties:Fakultät für Physik und Astronomie / Physikalisches Institut
Language:English
Parent Title (English):New Journal of Physics
Year of Completion:2014
Volume:16
Issue:043003
Source:New Journal of Physics 16 (2014) 043003. doi:10.1088/1367-2630/16/4/043003
DOI:https://doi.org/10.1088/1367-2630/16/4/043003
Sonstige beteiligte Institutionen:Wilhelm-Conrad-Röntgen-Forschungszentrum für komplexe Materialsysteme
Dewey Decimal Classification:5 Naturwissenschaften und Mathematik / 53 Physik / 530 Physik
Tag:QKD; electrically driven; free space; quantum dots; quantum key distribution
Release Date:2015/08/03
Licence (German):License LogoCC BY: Creative-Commons-Lizenz: Namensnennung