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dc.contributor.authorDaryanoosh, Shakib
dc.contributor.authorWiseman, Howard M
dc.contributor.authorBrandes, Tobias
dc.date.accessioned2017-11-22T01:30:51Z
dc.date.available2017-11-22T01:30:51Z
dc.date.issued2016
dc.identifier.issn2469-9950
dc.identifier.doi10.1103/PhysRevB.93.085127
dc.identifier.urihttp://hdl.handle.net/10072/100908
dc.description.abstractA Markovian open quantum system which relaxes to a unique steady state ρss of finite rank can be decomposed into a finite physically realizable ensemble (PRE) of pure states. That is, as shown by R. I. Karasik and H. M. Wiseman [Phys. Rev. Lett. 106, 020406 (2011)], in principle there is a way to monitor the environment so that in the long-time limit the conditional state jumps between a finite number of possible pure states. In this paper we show how to apply this idea to the dynamics of a double quantum dot arising from the feedback control of quantum transport, as previously considered by C. Pöltl, C. Emary, and T. Brandes [Phys. Rev. B 84, 085302 (2011)]. Specifically, we consider the limit where the system can be described as a qubit, and show that while the control scheme can always realize a two-state PRE, in the incoherent-tunneling regime there are infinitely many PREs compatible with the dynamics that cannot be so realized. For the two-state PREs that are realized, we calculate the counting statistics and see a clear distinction between the coherent and incoherent regimes.
dc.description.peerreviewedYes
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofpagefrom085127-1
dc.relation.ispartofpageto085127-11
dc.relation.ispartofjournalPhysical Review B
dc.relation.ispartofvolume93
dc.subject.fieldofresearchQuantum Information, Computation and Communication
dc.subject.fieldofresearchcode020603
dc.titleStochastic feedback control of quantum transport to realize a dynamical ensemble of two nonorthogonal pure states
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
dc.description.versionAccepted Manuscript (AM)
gro.facultyGriffith Sciences, School of Natural Sciences
gro.rights.copyright© 2016 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.
gro.hasfulltextFull Text
gro.griffith.authorWiseman, Howard M.
gro.griffith.authorDaryanoosh, Shakib


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