Please use this identifier to cite or link to this item: https://doi.org/10.1103/PhysRevA.89.014104
DC FieldValue
dc.titleDecoherence induced by a composite environment
dc.contributor.authorChaudhry, A.Z.
dc.contributor.authorGong, J.
dc.date.accessioned2014-10-16T09:20:04Z
dc.date.available2014-10-16T09:20:04Z
dc.date.issued2014-01-31
dc.identifier.citationChaudhry, A.Z., Gong, J. (2014-01-31). Decoherence induced by a composite environment. Physical Review A - Atomic, Molecular, and Optical Physics 89 (1) : -. ScholarBank@NUS Repository. https://doi.org/10.1103/PhysRevA.89.014104
dc.identifier.issn10502947
dc.identifier.urihttp://scholarbank.nus.edu.sg/handle/10635/96151
dc.description.abstractIt is not always justified to model the environment of a realistic quantum system as a collection of harmonic oscillators or two-level systems. To explore interesting physics associated with a composite environment, here we study the dynamics of a qubit coupled to a second two-level system, which is in turn coupled to a harmonic-oscillator bath. That is, the qubit of interest is in the presence of a composite environment consisting of the second two-level system and a conventional harmonic-oscillator bath. We investigate the issue of pointer states of decoherence for the qubit for different coupling strengths between the qubit and such a composite environment. It is shown that for weak-, intermediate-, or strong-coupling strengths, the qubit's reduced density matrix has a coupling-strength-dependent diagonal representation, thus yielding coupling-strength-dependent computational pointer states. Interestingly, the associated decoherence rate can decrease as the coupling strength increases. © 2014 American Physical Society.
dc.description.urihttp://libproxy1.nus.edu.sg/login?url=http://dx.doi.org/10.1103/PhysRevA.89.014104
dc.sourceScopus
dc.typeArticle
dc.contributor.departmentPHYSICS
dc.description.doi10.1103/PhysRevA.89.014104
dc.description.sourcetitlePhysical Review A - Atomic, Molecular, and Optical Physics
dc.description.volume89
dc.description.issue1
dc.description.page-
dc.description.codenPLRAA
dc.identifier.isiut000335225700017
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