Quantum key distribution over 122 km of standard telecom fiber

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dc.creatorGobby, C.
dc.creatorYuan, Z. L.
dc.creatorShields, A. J.
dc.date2004-12-22
dc.date.accessioned2026-07-07T06:11:49Z
dc.date.available2026-07-07T06:11:49Z
dc.descriptionWe report the first demonstration of quantum key distribution over a standard telecom fiber exceeding 100 km in length. Through careful optimisation of the interferometer and single photon detector, we achieve a quantum bit error ratio of 8.9% for a 122km link, allowing a secure shared key to be formed after error correction and privacy amplification. Key formation rates of up to 1.9 kbit/sec are achieved depending upon fiber length. We discuss the factors limiting the maximum fiber length in quantum cryptography.
dc.identifierhttps://arxiv.org/abs/quant-ph/0412171
dc.identifierhttp://arxiv.org/abs/quant-ph/0412171
dc.identifierApplied Physics Letters 84, 3762-3764(2004)
dc.identifierdoi:10.1063/1.1738173
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/92603
dc.subjectQuantum Physics
dc.titleQuantum key distribution over 122 km of standard telecom fiber
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