Scalability of GHZ and random-state entanglement in the presence of decoherence

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dc.creatorAolita, Leandro
dc.creatorCavalcanti, Daniel
dc.creatorAcín, Antonio
dc.creatorSalles, Alejo
dc.creatorTiersch, Markus
dc.creatorBuchleitner, Andreas
dc.creatorde Melo, Fernando
dc.date2008-12-22
dc.date2009-03-23
dc.date.accessioned2026-07-07T12:54:41Z
dc.date.available2026-07-07T12:54:41Z
dc.descriptionWe derive analytical upper bounds for the entanglement of generalized Greenberger-Horne-Zeilinger states coupled to locally depolarizing and dephasing environments, and for local thermal baths of arbitrary temperature. These bounds apply for any convex quantifier of entanglement, and exponential entanglement decay with the number of constituent particles is found. The bounds are tight for depolarizing and dephasing channels. We also show that randomly generated initial states tend to violate these bounds, and that this discrepancy grows with the number of particles.
dc.description9 pages, 3 figures
dc.identifierhttps://arxiv.org/abs/0812.4203
dc.identifierhttp://arxiv.org/abs/0812.4203
dc.identifierPhys. Rev. A 79, 032322 (2009)
dc.identifierdoi:10.1103/PhysRevA.79.032322
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/224018
dc.subjectQuantum Physics
dc.titleScalability of GHZ and random-state entanglement in the presence of decoherence
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