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dc.contributor.authorGambetta, Jayen_US
dc.contributor.authorWiseman, Howarden_US
dc.contributor.editorBernd Crasemannen_US
dc.date.accessioned2017-05-03T13:32:06Z
dc.date.available2017-05-03T13:32:06Z
dc.date.issued2001en_US
dc.date.modified2009-09-16T07:41:05Z
dc.identifier.issn10502947en_US
dc.identifier.doi10.1103/PhysRevA.64.042105en_AU
dc.identifier.urihttp://hdl.handle.net/10072/3767
dc.description.abstractFollowing evolution of an open quantum system one requires full knowledge of its dynamics. In this paper we consider open quantum systems for which the Hamiltonian is "uncertain." In particular, we treat in detail a simple system similar to that considered by Mabuchi [Quant. Semiclass. Opt. 8, 1103 (1996)]: a radiatively damped atom driven by an unknown Rabi frequency O (as would occur for an atom at an unknown point in a standing light wave). By measuring the environment of the system, knowledge about the system state, and about the uncertain dynamical parameter, can be acquired. We find that these two sorts of knowledge acquisition (quantified by the posterior distribution for O, and the conditional purity of the system, respectively) are quite distinct processes, which are not strongly correlated. Also, the quality and quantity of knowledge gain depend strongly on the type of monitoring scheme. We compare five different detection schemes (direct, adaptive, homodyne of the x quadrature, homodyne of the y quadrature, and heterodyne) using four different measures of the knowledge gain (Shannon information about O, variance in O, long-time system purity, and short-time system purity).en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherAmerican Physical Societyen_US
dc.publisher.placeUSAen_US
dc.publisher.urihttp://prola.aps.org/abstract/PRA/v64/i4/e042105en_AU
dc.relation.ispartofpagefrom042105.1en_US
dc.relation.ispartofpageto042105.14en_US
dc.relation.ispartofissue4en_US
dc.relation.ispartofjournalPhysical Review A: Atomic, Molecular and Optical Physicsen_US
dc.relation.ispartofvolume64en_US
dc.subject.fieldofresearchcode240201en_US
dc.titleState and dynamical parameter estimation for open quantum systemsen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.rights.copyrightCopyright 2001 American Physical Society. Reproduced in accordance with the copyright policy of the publisher. This journal is available online - use hypertext links.en_AU
gro.date.issued2001
gro.hasfulltextNo Full Text


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