Operator fidelity susceptibility, decoherence and quantum criticality

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dc.creatorLu, Xiao-Ming
dc.creatorSun, Zhe
dc.creatorWang, Xiaoguang
dc.creatorZanardi, Paolo
dc.date2008-07-09
dc.date2008-07-12
dc.date.accessioned2026-07-07T10:08:54Z
dc.date.available2026-07-07T10:08:54Z
dc.descriptionThe extension of the notion of quantum fidelity from the state-space level to the operator one can be used to study environment-induced decoherence. state-dependent operator fidelity sucepti- bility (OFS), the leading order term for slightly different operator parameters, is shown to have a nontrivial behavior when the environment is at critical points. Two different contributions to OFS are identified which have distinct physical origins and temporal dependence. Exact results for the finite-temperature decoherence caused by a bath described by the Ising model in transverse field are obtained.
dc.description7 pages, 3 figures, references added
dc.identifierhttps://arxiv.org/abs/0807.1370
dc.identifierhttp://arxiv.org/abs/0807.1370
dc.identifierPhys. Rev. A 78, 032309 (2008)
dc.identifierdoi:10.1103/PhysRevA.78.032309
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/171159
dc.subjectQuantum Physics
dc.titleOperator fidelity susceptibility, decoherence and quantum criticality
dc.typetext

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