Show simple item record

dc.contributor.authorBakkestuen, Vebjørn Hallberg
dc.contributor.authorCsirik, Mihaly Andras
dc.contributor.authorLaestadius, Andre
dc.contributor.authorPenz, Markus
dc.date.accessioned2024-10-14T11:39:36Z
dc.date.available2024-10-14T11:39:36Z
dc.date.created2024-10-11T13:13:54Z
dc.date.issued2024
dc.identifier.issn2331-8422
dc.identifier.urihttps://hdl.handle.net/11250/3158233
dc.description.abstractA detailed analysis of density-functional theory for quantum-electrodynamical model systems is provided. In particular, the quantum Rabi model, the Dicke model, and a generalization of the latter to multiple modes are considered. We prove a Hohenberg–Kohn theorem that manifests the magnetization and displacement as internal variables, along with several representability results. The constrained-search functionals for pure states and ensembles are introduced and analyzed. We find the optimizers for the pure-state constrained-search functional to be low-lying eigenstates of the Hamiltonian and, based on the properties of the optimizers, we formulate an adiabatic-connection formula. In the reduced case of the Rabi model we can even show differentiability of the universal density functional, which amounts to unique pure-state v-representability.en_US
dc.language.isoengen_US
dc.publisherCornell Universityen_US
dc.relation.ispartofseriesarXiv.org;
dc.rightsNavngivelse 4.0 Internasjonal*
dc.rights.urihttp://creativecommons.org/licenses/by/4.0/deed.no*
dc.titleQuantum-electrodynamical density-functional theory for the Dicke Hamiltonianen_US
dc.typeJournal articleen_US
dc.description.versionsubmittedVersionen_US
cristin.ispublishedtrue
cristin.fulltextpreprint
dc.identifier.doihttps://doi.org/10.48550/arXiv.2409.13767
dc.identifier.cristin2311378
dc.source.journalarXiv.orgen_US


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record

Navngivelse 4.0 Internasjonal
Except where otherwise noted, this item's license is described as Navngivelse 4.0 Internasjonal