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dc.contributor.authorSun, HB
dc.contributor.authorWiseman, HM
dc.date.accessioned2017-05-03T11:43:17Z
dc.date.available2017-05-03T11:43:17Z
dc.date.issued2009
dc.date.modified2010-06-09T07:34:52Z
dc.identifier.issn0953-8984
dc.identifier.doi10.1088/0953-8984/21/12/125301
dc.identifier.urihttp://hdl.handle.net/10072/26024
dc.description.abstractWe propose a quantum trajectory analysis of a scheme to measure the states of a coupled-dot device (qubit) where there is a fluctuating energy gap ? between the two states. The system consists of the qubit and a readout dot coupled to source and drain leads. The tunnel rate through the detector is conditioned by the occupation number of the nearer quantum dot (target) of the qubit and therefore probes the states of the qubit. We derive a Lindblad-form master equation to calculate the unconditional evolution of the qubit and a conditional stochastic master equation calculating the conditional evolution for different tunneling rates. The results show the effects of various device parameters and provide the optimum selection and combination of the system structure.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent561485 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoeng
dc.publisherInstitute of Physics Publishing
dc.publisher.placeUnited Kingdom
dc.relation.ispartofstudentpublicationN
dc.relation.ispartofpagefrom125301-1
dc.relation.ispartofpageto125301-5
dc.relation.ispartofjournalJournal of Physics: Condensed Matter
dc.relation.ispartofvolume21
dc.rights.retentionY
dc.subject.fieldofresearchCondensed matter physics
dc.subject.fieldofresearchQuantum information, computation and communication
dc.subject.fieldofresearchMaterials engineering
dc.subject.fieldofresearchNanotechnology
dc.subject.fieldofresearchcode5104
dc.subject.fieldofresearchcode510803
dc.subject.fieldofresearchcode4016
dc.subject.fieldofresearchcode4018
dc.titleA model for measurement of the states in a coupled-dot qubit
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, School of Natural Sciences
gro.rights.copyright© 2009 Institute of Physics Publishing. 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.
gro.date.issued2009
gro.hasfulltextFull Text
gro.griffith.authorWiseman, Howard M.


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