Tight bound on coherent states quantum key distribution with heterodyne detection

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dc.creatorLodewyck, Jerome
dc.creatorGrangier, Philippe
dc.date2007-04-11
dc.date.accessioned2026-07-07T12:41:52Z
dc.date.available2026-07-07T12:41:52Z
dc.descriptionWe propose a new upper bound for the eavesdropper's information in the direct and reverse reconciliated coherent states quantum key distribution protocols with heterodyne detection. This bound is derived by maximizing the leaked information over the symplectic group of transformations that spans every physical Gaussian attack on individual pulses. We exhibit four different attacks that reach this bound, which shows that this bound is tight. Finally, we compare the secret key rate obtained with this new bound to the homodyne rate.
dc.description8 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0704.1371
dc.identifierhttp://arxiv.org/abs/0704.1371
dc.identifierPhys. Rev. A 76, 022332 (2007)
dc.identifierdoi:10.1103/PhysRevA.76.022332
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219890
dc.subjectQuantum Physics
dc.titleTight bound on coherent states quantum key distribution with heterodyne detection
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