Degradability of Bosonic Gaussian channels

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dc.creatorCaruso, Filippo
dc.creatorGiovannetti, Vittorio
dc.date2006-03-28
dc.date2007-02-23
dc.date.accessioned2026-07-07T07:48:16Z
dc.date.available2026-07-07T07:48:16Z
dc.descriptionThe notion of weak-degradability of quantum channels is introduced by generalizing the degradability definition given by Devetak and Shor. Exploiting the unitary equivalence with beam-splitter/amplifier channels we then prove that a large class of one-mode Bosonic Gaussian channels are either weakly degradable or anti-degradable. In the latter case this implies that their quantum capacity Q is null. In the former case instead, this allows us to establish the additivity of the coherent information for those maps which admit unitary representation with single-mode pure environment.
dc.description7 pages, 1 figure, 1 table (minor editing)
dc.identifierhttps://arxiv.org/abs/quant-ph/0603257
dc.identifierhttp://arxiv.org/abs/quant-ph/0603257
dc.identifierPhysical Review A 74, 062307 (2006)
dc.identifierdoi:10.1103/PhysRevA.74.062307
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/124436
dc.subjectQuantum Physics
dc.subjectOther Condensed Matter
dc.subjectOptics
dc.titleDegradability of Bosonic Gaussian channels
dc.typetext

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