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.
Item Type: | Journal article |
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Form of publication: | Publisher's Version |
Keywords: | QKD;quantum key distribution; quantum dots;electrically driven; free space |
Faculties: | Physics |
Subjects: | 500 Science > 530 Physics |
URN: | urn:nbn:de:bvb:19-epub-24231-3 |
ISSN: | 1367-2630 |
Language: | English |
Item ID: | 24231 |
Date Deposited: | 25. Mar 2015, 13:01 |
Last Modified: | 08. May 2024, 08:24 |