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dc.contributor.authorCurty, Marcos
dc.contributor.authorJofre, Marc
dc.contributor.authorPruneri, Valerio
dc.contributor.authorMitchell, Morgan W.
dc.contributor.otherUniversitat Politècnica de Catalunya. Institut de Ciències Fotòniques
dc.date.accessioned2015-11-05T12:20:59Z
dc.date.available2015-11-05T12:20:59Z
dc.date.issued2015-06-12
dc.identifier.issn1099-4300
dc.identifier.urihttp://hdl.handle.net/2117/78820
dc.description.abstractSignal state preparation in quantum key distribution schemes can be realized using either an active or a passive source. Passive sources might be valuable in some scenarios; for instance, in those experimental setups operating at high transmission rates, since no externally driven element is required. Typical passive transmitters involve parametric down-conversion. More recently, it has been shown that phase-randomized coherent pulses also allow passive generation of decoy states and Bennett–Brassard 1984 (BB84) polarization signals, though the combination of both setups in a single passive source is cumbersome. In this paper, we present a complete passive transmitter that prepares decoy-state BB84 signals using coherent light. Our method employs sum-frequency generation together with linear optical components and classical photodetectors. In the asymptotic limit of an infinite long experiment, the resulting secret key rate (per pulse) is comparable to the one delivered by an active decoy-state BB84 setup with an infinite number of decoy settings.
dc.format.extent19 p.
dc.language.isoeng
dc.publisherMDPI
dc.rightsAttribution-NonCommercial-NoDerivs 3.0 Spain
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/3.0/es/
dc.subjectÀrees temàtiques de la UPC::Física
dc.subject.lcshQuantum communication
dc.subject.otherquantum cryptography
dc.titlePassive Decoy-State Quantum Key Distribution with Coherent Light
dc.typeArticle
dc.subject.lemacCriptografia
dc.description.peerreviewedPeer Reviewed
dc.relation.publisherversionhttp://www.mdpi.com/1099-4300/17/6/4064
dc.rights.accessOpen Access
dc.description.versionPostprint (author's final draft)
local.citation.volume17
local.citation.number6
local.citation.startingPage4064
local.citation.endingPage4082
local.personalitzacitaciotrue


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Attribution-NonCommercial-NoDerivs 3.0 Spain
Except where otherwise noted, content on this work is licensed under a Creative Commons license : Attribution-NonCommercial-NoDerivs 3.0 Spain