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.…
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 |
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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): | CC BY: Creative-Commons-Lizenz: Namensnennung |