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dc.contributor.authorGambetta, Jayen_US
dc.contributor.authorWiseman, Howarden_US
dc.date.accessioned2017-05-03T11:50:54Z
dc.date.available2017-05-03T11:50:54Z
dc.date.issued2002en_US
dc.date.modified2009-10-12T23:13:03Z
dc.identifier.issn10502947en_US
dc.identifier.doi10.1103/PhysRevA.66.012108en_AU
dc.identifier.urihttp://hdl.handle.net/10072/6989
dc.description.abstractDo stochastic Schr椩nger equations, also known as unravelings, have a physical interpretation? In the Markovian limit, where the system on average obeys a master equation, the answer is yes. Markovian stochastic Schr椩nger equations generate quantum trajectories for the system state conditioned on continuously monitoring the bath. For a given master equation, there are many different unravelings, corresponding to different sorts of measurement on the bath. In this paper we address the non-Markovian case, and in particular the sort of stochastic Schr椩nger equation introduced by Strunz, Di㳩, and Gisin [Phys. Rev. Lett. 82, 1801 (1999)]. Using a quantum-measurement theory approach, we rederive their unraveling that involves complex-valued Gaussian noise. We also derive an unraveling involving real-valued Gaussian noise. We show that in the Markovian limit, these two unravelings correspond to heterodyne and homodyne detection, respectively. Although we use quantum-measurement theory to define these unravelings, we conclude that the stochastic evolution of the system state is not a true quantum trajectory, as the identity of the state through time is a fiction.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent257514 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherAmerican Physical Societyen_US
dc.publisher.placeUSAen_US
dc.publisher.urihttp://prola.aps.org/en_AU
dc.relation.ispartofpagefrom012108.1en_US
dc.relation.ispartofpageto012108.17en_US
dc.relation.ispartofjournalPhysical Review A: Atomic, Molecular and Optical Physicsen_US
dc.relation.ispartofvolume66en_US
dc.subject.fieldofresearchcode240201en_US
dc.titleNon-Markovian stochastic Schrodinger equations: Generalization to real-valued noise using quantum measurement theory.en_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.rights.copyrightCopyright 2002 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_AU
gro.date.issued2002
gro.hasfulltextFull Text


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