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Connecting nth order generalised quantum Rabi models: Emergence of nonlinear spin-boson coupling via spin rotations

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dc.affiliation.dptoUC3M. Departamento de Físicaes
dc.contributor.authorCasanova, Jorge
dc.contributor.authorPuebla Antunes, Ricardo
dc.contributor.authorMoya Cessa, Hector
dc.contributor.authorPlenio, Martin B.
dc.date.accessioned2023-10-16T12:24:04Z
dc.date.available2023-10-16T12:24:04Z
dc.date.issued2018-09-28
dc.description.abstractWe establish an approximate equivalence between a generalised quantum Rabi model and its nth order counterparts, where spin-boson interactions are nonlinear as they comprise a simultaneous exchange of n bosonic excitations. Although there exists no unitary transformation between these models, we demonstrate their equivalence to a good approximation in a wide range of parameters. This shows that nonlinear spin-boson couplings, i.e., nth order quantum Rabi models, are accessible to quantum systems with only linear coupling between boson and spin modes by simply adding spin rotations and after an appropriate transformation. Furthermore, our result prompts novel approximate analytical solutions to the dynamics of the quantum Rabi model in the ultrastrong coupling regime improving previous approaches.en
dc.format.extent7es
dc.identifier.bibliographicCitationCasanova, J., Puebla, R., Moya-Cessa, H., & Plenio, M. B. (2018). Connecting nth order generalised quantum Rabi models: Emergence of nonlinear spin-boson coupling via spin rotations. npj Quantum Information, 4, (1).en
dc.identifier.doi10.1038/s41534-018-0096-9
dc.identifier.issn2056-6387
dc.identifier.publicationfirstpage1
dc.identifier.publicationlastpage7
dc.identifier.publicationtitlenpj Quantum Informationen
dc.identifier.publicationvolume4
dc.identifier.urihttps://hdl.handle.net/10016/38614
dc.identifier.uxxiAR/0000030999
dc.language.isoengen
dc.rights© The Author(s) 2018en
dc.rightsAtribución 3.0 España*
dc.rights.accessRightsopen accessen
dc.rights.urihttp://creativecommons.org/licenses/by/3.0/es/*
dc.subject.ecienciaFísicaes
dc.subject.otherQuantum mechanicsen
dc.subject.otherSingle photons and quantum effectsen
dc.titleConnecting nth order generalised quantum Rabi models: Emergence of nonlinear spin-boson coupling via spin rotationsen
dc.typeresearch article*
dc.type.hasVersionVoR*
dspace.entity.typePublication
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