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

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 Hoefling; Harald Weinfurter

doi:10.1088/1367-2630/16/4/043003

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

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 Hoefling, Harald Weinfurter

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

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 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.

Original language	English
Article number	043003
Number of pages	10
Journal	New Journal of Physics
Volume	16
DOIs	https://doi.org/10.1088/1367-2630/16/4/043003
Publication status	Published - 7 Apr 2014

Keywords

QKD
Quantum key distribution
Quantum dots
Electrically driven
Free space

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10.1088/1367-2630/16/4/043003

rau2014newjphysics043003
© 2014 IOP Publishing Ltd and Deutsche Physikalische Gesellschaft. This is an Open Access article distributed in accordance with the terms of the Creative Commons Attribution (CC BY 3.0) license, which permits others to distribute, remix, adapt and build upon this work, for commercial use, provided the original work is properly cited
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Rau, M., Heindel, T., Unsleber, S., Braun, T., Fischer, J., Frick, S., Nauerth, S., Schneider, C., Vest, G., Reitzenstein, S., Kamp, M., Forchel, A., Hoefling, S., & Weinfurter, H. (2014). Free space quantum key distribution over 500 meters using electrically driven quantum dot single-photon sources-a proof of principle experiment. New Journal of Physics, 16, Article 043003 . https://doi.org/10.1088/1367-2630/16/4/043003

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abstract = "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 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.",

keywords = "QKD, Quantum key distribution, Quantum dots, Electrically driven, Free space",

author = "Markus Rau and Tobias Heindel and Sebastian Unsleber and Tristan Braun and Julian Fischer and Stefan Frick and Sebastian Nauerth and Christian Schneider and Gwenaelle Vest and Stephan Reitzenstein and Martin Kamp and Alfred Forchel and Sven Hoefling and Harald Weinfurter",

note = "The authors gratefully acknowledge expert sample preparation by M Emmerling and A Wolf as well as financial support by the German Ministry of Education and Research through the project QPENS and QUASAR.",

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doi = "10.1088/1367-2630/16/4/043003",

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Rau, M, Heindel, T, Unsleber, S, Braun, T, Fischer, J, Frick, S, Nauerth, S, Schneider, C, Vest, G, Reitzenstein, S, Kamp, M, Forchel, A, Hoefling, S & Weinfurter, H 2014, 'Free space quantum key distribution over 500 meters using electrically driven quantum dot single-photon sources-a proof of principle experiment', New Journal of Physics, vol. 16, 043003 . https://doi.org/10.1088/1367-2630/16/4/043003

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AU - Rau, Markus

AU - Heindel, Tobias

AU - Unsleber, Sebastian

AU - Braun, Tristan

AU - Fischer, Julian

AU - Frick, Stefan

AU - Nauerth, Sebastian

AU - Schneider, Christian

AU - Vest, Gwenaelle

AU - Reitzenstein, Stephan

AU - Kamp, Martin

AU - Forchel, Alfred

AU - Hoefling, Sven

AU - Weinfurter, Harald

N1 - The authors gratefully acknowledge expert sample preparation by M Emmerling and A Wolf as well as financial support by the German Ministry of Education and Research through the project QPENS and QUASAR.

PY - 2014/4/7

Y1 - 2014/4/7

N2 - 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 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.

AB - 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 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.

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KW - Quantum dots

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JF - New Journal of Physics

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

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