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dc.contributor.authorWang, J
dc.contributor.authorWiseman, HM
dc.contributor.editorBernd Crasemann
dc.date.accessioned2017-05-03T13:32:04Z
dc.date.available2017-05-03T13:32:04Z
dc.date.issued2001
dc.date.modified2009-12-01T05:29:44Z
dc.identifier.issn1050-2947
dc.identifier.doi10.1103/PhysRevA.64.063810
dc.identifier.urihttp://hdl.handle.net/10072/3761
dc.description.abstractUnit-efficiency homodyne detection of the resonance fluorescence of a two-level atom collapses the quantum state of the atom to a stochastically moving point on the Bloch sphere. Recently, Hofmann, Mahler, and Hess [Phys. Rev. A 57, 4877 (1998)] showed that by making part of the coherent driving proportional to the homodyne photocurrent one can stabilize the state to any point on the bottom-half of the sphere. Here we reanalyze their proposal using the technique of stochastic master equations, allowing their results to be generalized in two ways. First, we show that any point on the upper- or lower-half, but not the equator, of the sphere may be stabilized. Second, we consider nonunit-efficiency detection, and quantify the effectiveness of the feedback by calculating the maximal purity obtainable in any particular direction in Bloch space.
dc.description.peerreviewedYes
dc.description.publicationstatusYes
dc.format.extent382262 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglish
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.publisher.placeUSA
dc.publisher.urihttps://journals.aps.org/pra/abstract/10.1103/PhysRevA.64.063810
dc.relation.ispartofpagefrom063810.1
dc.relation.ispartofpageto063810.9
dc.relation.ispartofissue6
dc.relation.ispartofjournalPhysical Review A: Atomic, Molecular and Optical Physics
dc.relation.ispartofvolume64
dc.subject.fieldofresearchMathematical sciences
dc.subject.fieldofresearchPhysical sciences
dc.subject.fieldofresearchChemical sciences
dc.subject.fieldofresearchcode49
dc.subject.fieldofresearchcode51
dc.subject.fieldofresearchcode34
dc.titleFeedback-stabilization of an arbitrary pure state of a two-level atom
dc.typeJournal article
dc.type.descriptionC1 - Articles
dc.type.codeC - Journal Articles
gro.facultyGriffith Sciences, Griffith Institute for Drug Discovery
gro.rights.copyright© 2001 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.date.issued2001
gro.hasfulltextFull Text
gro.griffith.authorWiseman, Howard M.


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