Differential-phase-shift quantum key distribution using heralded narrow-band single photons

We demonstrate the first proof of principle differential phase shift (DPS) quantum key distribution (QKD) using narrow-band heralded single photons with amplitude-phase modulations. In the 3-pulse case, we obtain a quantum bit error rate (QBER) as low as 3.06% which meets the unconditional security...

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Bibliographic Details
Published in:Optics express 2013-04, Vol.21 (8), p.9505-9513
Main Authors: Liu, Chang, Zhang, Shanchao, Zhao, Luwei, Chen, Peng, Fung, C-H F, Chau, H F, Loy, M M T, Du, Shengwang
Format: Article
Language:English
Subjects:
Computer Security
Computer Simulation
Models, Theoretical
Photons
Quantum Theory
Signal Processing, Computer-Assisted
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Summary:We demonstrate the first proof of principle differential phase shift (DPS) quantum key distribution (QKD) using narrow-band heralded single photons with amplitude-phase modulations. In the 3-pulse case, we obtain a quantum bit error rate (QBER) as low as 3.06% which meets the unconditional security requirement. As we increase the pulse number up to 15, the key creation efficiency approaches 93.4%, but with a cost of increasing the QBER. Our result suggests that narrow-band single photons maybe a promising source for the DPS-QKD protocol.
ISSN:1094-4087
1094-4087
DOI:10.1364/OE.21.009505