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dc.contributor.CRUESPUniversidade Estadual de Campinaspt_BR
dc.typeArtigo de periódicopt_BR
dc.titleHigh efficiency transfer of quantum information and multiparticle entanglement generation in translation-invariant quantum chainspt_BR
dc.contributor.authorPlenio, MBpt_BR
dc.contributor.authorSemiao, FLpt_BR
unicamp.authorUniv London Imperial Coll Sci Technol & Med, Blackett Lab, QOLS, London SW7 2BW, England Univ London Imperial Coll Sci Technol & Med, Inst Math Sci, London SW7 2AZ, England Univ Estadual Campinas, Inst Fis Gleb Wataghin, BR-13083970 Campinas, SP, Brazilpt_BR
dc.description.abstractWe demonstrate that a translation-invariant chain of interacting quantum systems can be used for high efficiency transfer of quantum entanglement and the generation of multiparticle entanglement over large distances and between arbitrary sites without the requirement of precise spatial or temporal control. The scheme is largely insensitive to disorder and random coupling strengths in the chain. We discuss harmonic oscillator systems both in the case of arbitrary Gaussian states and in situations when at most one excitation is in the system. The latter case, which we prove to be equivalent to an xy-spin chain, may be used to generate genuine multiparticle entanglement. Such a 'quantum data bus' may prove useful in future solid state architectures for quantum information
dc.relation.ispartofNew Journal Of Physicspt_BR
dc.relation.ispartofabbreviationNew J. Phys.pt_BR
dc.publisherIop Publishing Ltdpt_BR 28pt_BR
dc.identifier.citationNew Journal Of Physics. Iop Publishing Ltd, v. 7, 2005.pt_BR
dc.sourceWeb of Sciencept_BR
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