TY - JOUR
A1 - Rau, Markus
A1 - Heindel, Tobias
A1 - Unsleber, Sebastian
A1 - Braun, Tristan
A1 - Fischer, Julian
A1 - Frick, Stefan
A1 - Nauerth, Sebastian
A1 - Schneider, Christian
A1 - Vest, Gwenaelle
A1 - Reitzenstein, Stephan
A1 - Kamp, Martin
A1 - Forchel, Alfred
A1 - HÃ¶fling, Sven
A1 - Weinfurter, Harald
T1 - Free space quantum key distribution over 500 meters using electrically driven quantum dot single-photon sources-a proof of principle experiment
JF - New Journal of Physics
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.
KW - QKD
KW - electrically driven
KW - free space
KW - quantum dots
KW - quantum key distribution
Y1 - 2014
U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:bvb:20-opus-116760
VL - 16
IS - 043003
ER -