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dc.contributor.authorPaavola, Janikaen_US
dc.contributor.authorJ. Hall, Michaelen_US
dc.contributor.authorG. A. Paris, Matteoen_US
dc.contributor.authorManiscalco, Sabrinaen_US
dc.date.accessioned2017-05-03T13:12:05Z
dc.date.available2017-05-03T13:12:05Z
dc.date.issued2011en_US
dc.date.modified2012-07-27T03:26:58Z
dc.identifier.issn10502947en_US
dc.identifier.doi10.1103/PhysRevA.84.012121en_US
dc.identifier.urihttp://hdl.handle.net/10072/42821
dc.description.abstractThe transition from quantum to classical, in the case of a quantum harmonic oscillator, is typically identified with the transition from a quantum superposition of macroscopically distinguishable states, such as the Schr诤inger-cat state, into the corresponding statistical mixture. This transition is commonly characterized by the asymptotic loss of the interference term in the Wigner representation of the cat state. In this paper we show that the quantum-to-classical transition has different dynamical features depending on the measure for nonclassicality used. Measures based on an operatorial definition have well-defined physical meaning and allow a deeper understanding of the quantum-to-classical transition. Our analysis shows that, for most nonclassicality measures, the Schr诤inger-cat state becomes classical after a finite time. Moreover, our results challenge the prevailing idea that more macroscopic states are more susceptible to decoherence in the sense that the transition from quantum to classical occurs faster. Since non classicality is a prerequisite for entanglement generation our results also bridge the gap between decoherence, which is lost only asymptotically, and entanglement, which may show a "sudden death." In fact, whereas the loss of coherences still remains asymptotic, we emphasize that the transition from quantum to classical can indeed occur at a finite time.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_US
dc.format.extent545672 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_US
dc.publisherAmerican Physical Societyen_US
dc.publisher.placeUnited Statesen_US
dc.relation.ispartofstudentpublicationNen_US
dc.relation.ispartofpagefrom012121-1en_US
dc.relation.ispartofpageto012121-9en_US
dc.relation.ispartofissue1en_US
dc.relation.ispartofjournalPhysical Review Aen_US
dc.relation.ispartofvolume84en_US
dc.rights.retentionYen_US
dc.subject.fieldofresearchQuantum Physics not elsewhere classifieden_US
dc.subject.fieldofresearchQuantum Opticsen_US
dc.subject.fieldofresearchcode020699en_US
dc.subject.fieldofresearchcode020604en_US
dc.titleFinite-time quantum-to-classical transition for a Schrödinger-cat stateen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.rights.copyrightCopyright 2011 American Physical Society. This is the author-manuscript version of this paper. Reproduced in accordance with the copyright policy of the publisher. Please refer to the journal's website for access to the definitive, published version.en_US
gro.date.issued2011
gro.hasfulltextFull Text


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