Quantum key distribution over a 72 dB channel loss using ultralow dark count superconducting single-photon detectors

Abstract

We report the first Quantum key distribution (QKD) experiment over a 72 dB channel loss using superconducting nanowire single-photon detectors (SSPD, SNSPD) with the dark count rate (DCR) of 0.01 cps. The DCR of the SSPD, which is dominated by the blackbody radiation at room temperature, is blocked by introducing cold optical bandpass filter. We employ the differential phase shift QKD (DPS-QKD) scheme with a 1 GHz system clock rate. The quantum bit error rate (QBER) below 3 % is achieved when the length of the dispersion shifted fiber (DSF) is 336 km (72 dB loss), which is low enough to generate secure keys.

arXiv comment6 pages, 3 figures, accepted for publication in Opt. Lett

References in corpus (12)

• Quantum Cryptography
• Detecting Single Infrared Photons with 93% System Efficiency
• Field test of quantum key distribution in the Tokyo QKD Network
• Superconducting nanowire single-photon detectors: physics and applications
• Quantum key distribution over 40 dB channel loss using superconducting single photon detectors
• High rate, long-distance quantum key distribution over 250km of ultra low loss fibres
• 2-GHz clock quantum key distribution over 260 km of standard telecom fiber
• High performance fiber-coupled NbTiN superconducting nanowire single photon detectors with Gifford-McMahon cryocooler
• Security of differential phase shift quantum key distribution against individual attacks
• Unconditional Security of Single-Photon Differential Phase Shift Quantum Key Distribution
• Superconducting nanowire single-photon detector with ultralow dark count rate using cold optical filters
• Countermeasure against tailored bright illumination attack for DPS-QKD

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