LONG-DISTANCE FIBER-OPTIC QUANTUM KEY DISTRIBUTION USING SUPERCONDUCTING DETECTORS
V. L. Kurochkin1,2, A. V. Zverev1, Yu. V. Kurochkin3, I. I. Ryabtsev1,2,3, I. G. Neizvestnyi1, R. V. Ozhegov4, G. N. Gol’tsman4, P. A. Larionov4
1Rzhanov Institute of Semiconductor Physics, Siberian Branch, Russian Academy of Sciences, pr. Akademika Lavrent’eva 13, Novosibirsk, 630090 Russia
2Novosibirsk State University, ul. Pirogova 2, Novosibirsk 630090, Russia
3Russian Quantum Center, ul. Novaya 100A, Moscow 143025, Russia
4Moscow State Pedagogical University, ul. Malaya Pirogovskaya 1, Moscow, 119991 Russia
Keywords: квантовая криптография, детекторы одиночных фотонов, quantum cryptography, single photon detectors
Abstract
This paper presents the results of experimental studies on quantum key distribution in optical fiber using superconducting detectors. Key generation was obtained on an experimental setup based on a self-compensation optical circuit with an optical fiber length of 101.1 km. It was first shown that photon polarization encoding can be used for quantum key distribution in optical fiber over a distance in excess of 300 km.
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