Show simple item record

dc.contributor.authorWarszawski, Prahladen_US
dc.contributor.authorWiseman, Howarden_US
dc.contributor.editorBernd Crasemannen_US
dc.date.accessioned2017-05-03T13:31:55Z
dc.date.available2017-05-03T13:31:55Z
dc.date.issued2001en_US
dc.date.modified2009-12-01T05:29:29Z
dc.identifier.issn10502947en_US
dc.identifier.doi10.1103/PhysRevA.63.013803en_AU
dc.identifier.urihttp://hdl.handle.net/10072/3775
dc.description.abstractFeedback in compound quantum systems is effected by using the output from one subsystem ("the system") to control the evolution of a second subsystem ("the ancilla") that is reversibly coupled to the system. In the limit where the ancilla responds to fluctuations on a much shorter time scale than does the system, we show that it can be adiabatically eliminated, yielding a master equation for the system alone. This is very significant as it decreases the necessary basis size for numerical simulation and allows the effect of the ancilla to be understood more easily. We consider two types of ancilla: a two-level ancilla (e.g., a two-level atom) and an infinite-level ancilla (e.g., an optical mode). For each, we consider two forms of feedback: coherent (for which a quantum-mechanical description of the feedback loop is required) and incoherent (for which a classical description is sufficient). We test the master equations we obtain using numerical simulation of the full dynamics of the compound system. For the system (a parametric oscillator) and feedback (intensity-dependent detuning) we choose, good agreement is found in the limit of heavy damping of the ancilla. We discuss the relation of our work to previous work on feedback in compound quantum systems, and also to previous work on adiabatic elimination in general.en_US
dc.description.peerreviewedYesen_US
dc.description.publicationstatusYesen_AU
dc.format.extent284015 bytes
dc.format.mimetypeapplication/pdf
dc.languageEnglishen_US
dc.language.isoen_AU
dc.publisherAmerican Physical Societyen_US
dc.publisher.placeUSAen_US
dc.publisher.urihttp://prola.aps.org/browse/PRAen_AU
dc.relation.ispartofpagefrom01380.1en_US
dc.relation.ispartofpageto01380.14en_US
dc.relation.ispartofedition-en_US
dc.relation.ispartofissue1en_US
dc.relation.ispartofjournalPhysical Review A: Atomic, Molecular and Optical Physicsen_US
dc.relation.ispartofvolume63en_US
dc.subject.fieldofresearchcode240201en_US
dc.titleAdiabatic Elimination in Compound Quantum Systems with Feedbacken_US
dc.typeJournal articleen_US
dc.type.descriptionC1 - Peer Reviewed (HERDC)en_US
dc.type.codeC - Journal Articlesen_US
gro.rights.copyrightCopyright 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.en_AU
gro.date.issued2001
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