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dc.contributor.authorOxtoby, Neilen_US
dc.contributor.authorWarszawski, Prahladen_US
dc.contributor.authorWiseman, Howarden_US
dc.contributor.authorSun, He-Bien_US
dc.contributor.authorS Polkinghorne, R.en_US
dc.date.accessioned2017-05-03T11:51:16Z
dc.date.available2017-05-03T11:51:16Z
dc.date.issued2005en_US
dc.date.modified2009-10-12T23:13:58Z
dc.identifier.issn10980121en_US
dc.identifier.doi10.1103/PhysRevB.71.165317en_AU
dc.identifier.urihttp://hdl.handle.net/10072/4935
dc.description.abstractWe present a new model for the continuous measurement of a coupled quantum dot charge qubit. We model the effects of a realistic measurement, namely adding noise to, and filtering, the current through the detector. This is achieved by embedding the detector in an equivalent circuit for measurement. Our aim is to describe the evolution of the qubit state conditioned on the macroscopic output of the external circuit. We achieve this by generalizing a recently developed quantum trajectory theory for realistic photodetectors [P. Warszawski, H. M. Wiseman, and H. Mabuchi, Phys. Rev. A 65, 023802 (2002)] to treat solid-state detectors. This yields stochastic equations whose (numerical) solutions are the "realistic quantum trajectories" of the conditioned qubit state. We derive our general theory in the context of a low transparency quantum point contact. Areas of application for our theory and its relation to previous work are discussed.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent143802 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherAmerican Physical Societyen_US
dc.publisher.placeRidge, NYen_US
dc.publisher.urihttp://prola.aps.org/browse/PRBen_AU
dc.relation.ispartofstudentpublicationNen_AU
dc.relation.ispartofpagefrom165317.1en_US
dc.relation.ispartofpageto165317.9en_US
dc.relation.ispartofjournalPhysical Review B: Condensed Matter and Materials Physicsen_US
dc.relation.ispartofvolume71en_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchcode240402en_US
dc.titleQuantum trajectories for the realistic measurement of a solid-state charge qubiten_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.rights.copyrightCopyright 2005 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.issued2005
gro.hasfulltextFull Text


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