Show simple item record

dc.contributor.authorWarszawski, Prahladen_US
dc.contributor.authorGambetta, Jayen_US
dc.contributor.authorWiseman, Howarden_US
dc.date.accessioned2017-04-24T08:47:38Z
dc.date.available2017-04-24T08:47:38Z
dc.date.issued2004en_US
dc.date.modified2009-10-12T23:14:45Z
dc.identifier.issn10502947en_US
dc.identifier.doi10.1103/PhysRevA.69.042104en_AU
dc.identifier.urihttp://hdl.handle.net/10072/5727
dc.description.abstractWe investigate the effect of imperfections in realistic detectors upon the problem of quantum state and parameter estimation by continuous monitoring of an open quantum system. Specifically, we have reexamined the system of a two-level atom with an unknown Rabi frequency introduced by Gambetta and Wiseman [Phys. Rev. A 64, 042105 (2001)]. We consider only direct photodetection and use the realistic quantum trajectory theory reported by Warszawski, Wiseman, and Mabuchi [Phys. Rev. A 65, 023802 (2002)]. The most significant effect comes from a finite bandwidth, corresponding to an uncertainty in the response time of the photodiode. Unless the bandwidth is significantly greater than the Rabi frequency, the observer's ability to obtain information about the unknown Rabi frequency, and about the state of the atom, is severely compromised. This result has implications for quantum control in the presence of unknown parameters for realistic detectors, and even for ideal detectors, as it implies that most of the information in the measurement record is contained in the precise timing of the detections.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent643511 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherAmerican Physical Societyen_US
dc.publisher.placeUSAen_US
dc.publisher.urihttp://pra.aps.org/en_AU
dc.relation.ispartofpagefrom042104.1en_US
dc.relation.ispartofpageto042104.8en_US
dc.relation.ispartofjournalPhysical Review Aen_US
dc.relation.ispartofvolume69en_US
dc.subject.fieldofresearchcode240402en_US
dc.titleDynamical parameter estimation using realistic photodetectionen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.rights.copyrightCopyright 2004 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.issued2004
gro.hasfulltextFull Text


Files in this item

This item appears in the following Collection(s)

  • Journal articles
    Contains articles published by Griffith authors in scholarly journals.

Show simple item record