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dc.contributor.authorGambetta, Jayen_US
dc.contributor.authorOxtoby, Neilen_US
dc.contributor.authorWiseman, Howarden_US
dc.contributor.editorP D Adamsen_US
dc.date.accessioned2017-04-04T15:08:13Z
dc.date.available2017-04-04T15:08:13Z
dc.date.issued2008en_US
dc.date.modified2009-12-21T03:11:57Z
dc.identifier.issn10980121en_US
dc.identifier.doi10.1103/PhysRevB.77.125304en_AU
dc.identifier.urihttp://hdl.handle.net/10072/22531
dc.description.abstractThe extension of quantum trajectory theory to incorporate realistic imperfections in the measurement of solid-state qubits is important for quantum computation, particularly for the purposes of state preparation and error correction as well as for readout of computations. Previously this has been achieved for low-frequency (dc) weak measurements. In this paper we extend realistic quantum trajectory theory to include radio frequency (rf) weak measurements where a low-transparency quantum point contact (QPC), coupled to a charge qubit, is used to damp a classical oscillator circuit. The resulting realistic quantum trajectory equation must be solved numerically. We present an analytical result for the limit of large dissipation within the oscillator (relative to the QPC), where the oscillator slaves to the qubit. The rf+dc mode of operation is considered. Here the QPC is biased (dc) as well as subjected to a small-amplitude sinusoidal carrier signal (rf). The rf+dc QPC is shown to be a low-efficiency charge-qubit detector, which may nevertheless be higher than the dc-QPC (which is subject to 1/f noise).en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent214152 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherAmerican Physical Societyen_US
dc.publisher.placeUnited Statesen_US
dc.publisher.urihttp://prb.aps.org/en_AU
dc.relation.ispartofstudentpublicationNen_AU
dc.relation.ispartofpagefrom125304 -1en_US
dc.relation.ispartofpageto125304 -11en_US
dc.relation.ispartofjournalPhysical Review B (Condensed Matter and Materials Physics)en_US
dc.relation.ispartofvolume77en_US
dc.rights.retentionYen_AU
dc.subject.fieldofresearchcode240201en_US
dc.titleModel for monitoring of a charge qubit using a radio-frequency quantum point contact including experimental imperfectionsen_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.rights.copyrightCopyright 2008 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.issued2008
gro.hasfulltextFull Text


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