Efficient and Robust Quantum Key Distribution With Minimal State Tomography

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dc.creatorEnglert, Berthold-Georg
dc.creatorKaszlikowski, Dagomir
dc.creatorNg, Hui Khoon
dc.creatorChua, Wee Kang
dc.creatorŘeháček, Jaroslav
dc.creatorAnders, Janet
dc.date2004-12-09
dc.date2008-05-19
dc.date.accessioned2026-07-07T09:39:30Z
dc.date.available2026-07-07T09:39:30Z
dc.descriptionWe introduce the Singapore protocol, a qubit protocol for quantum key distribution that is fully tomographic, more efficient than other tomographic protocols, and very robust. Under ideal circumstances the efficiency is log_2(4/3)=0.415 key bits per qubit sent. This is 25% more than the efficiency of 1/3=0.333 for the standard six-state protocol, which sets the benchmark. We describe a simple two-way communication scheme that extracts 0.4 key bits per qubit and thus gets close to the information-theoretical limit. The noise thresholds that we report for a hierarchy of eavesdropping attacks demonstrate the robustness of the protocol: A secure key can be extracted if there is less than 38.9% noise.
dc.descriptionTitle modified; 4 pages, 2 figures; v4 is the updated and much extended version of 18/05/08; this is Ref. [30] in quant-ph/0405084 v2
dc.identifierhttps://arxiv.org/abs/quant-ph/0412075
dc.identifierhttp://arxiv.org/abs/quant-ph/0412075
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/161194
dc.subjectQuantum Physics
dc.titleEfficient and Robust Quantum Key Distribution With Minimal State Tomography
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