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dc.contributor.authorMann, N.
dc.contributor.authorBakhtiari, M. Reza
dc.contributor.authorMassel, Francesco
dc.contributor.authorPelster, A.
dc.contributor.authorThorwart, M.
dc.date.accessioned2017-05-08T06:39:16Z
dc.date.available2017-05-08T06:39:16Z
dc.date.issued2017
dc.identifier.citationMann, N., Bakhtiari, M. R., Massel, F., Pelster, A., & Thorwart, M. (2017). Driven Bose-Hubbard model with a parametrically modulated harmonic trap. <i>Physical Review A</i>, <i>95</i>(4), Article 043604. <a href="https://doi.org/10.1103/PhysRevA.95.043604" target="_blank">https://doi.org/10.1103/PhysRevA.95.043604</a>
dc.identifier.otherCONVID_26984506
dc.identifier.otherTUTKAID_73677
dc.identifier.urihttps://jyx.jyu.fi/handle/123456789/53810
dc.description.abstractWe investigate a one-dimensional Bose–Hubbard model in a parametrically driven global harmonic trap. The delicate interplay of both the local interaction of the atoms in the lattice and the driving of the global trap allows us to control the dynamical stability of the trapped quantum many-body state. The impact of the atomic interaction on the dynamical stability of the driven quantum many-body state is revealed in the regime of weak interaction by analyzing a discretized Gross–Pitaevskii equation within a Gaussian variational ansatz, yielding a Mathieu equation for the condensate width. The parametric resonance condition is shown to be modified by the atom interaction strength. In particular, the effective eigenfrequency is reduced for growing interaction in the mean-field regime. For a stronger interaction, the impact of the global parametric drive is determined by the numerically exact time-evolving block decimation scheme. When the trapped bosons in the lattice are in a Mott insulating state, the absorption of energy from the driving field is suppressed due to the strongly reduced local compressibility of the quantum many-body state. In particular, we find that the width of the local Mott region shows a breathing dynamics. Finally, we observe that the global modulation also induces an effective time-independent inhomogeneous hopping strength for the atoms.en
dc.languageeng
dc.language.isoeng
dc.publisherAmerican Physical Society
dc.relation.ispartofseriesPhysical Review A
dc.subject.otherquantum many-body systems
dc.subject.otherquantum gas
dc.subject.otherBose–Hubbard model
dc.subject.otherharmonic trap
dc.titleDriven Bose-Hubbard model with a parametrically modulated harmonic trap
dc.typearticle
dc.identifier.urnURN:NBN:fi:jyu-201705032162
dc.contributor.laitosFysiikan laitosfi
dc.contributor.laitosDepartment of Physicsen
dc.contributor.oppiaineNanoscience Centerfi
dc.contributor.oppiaineNanoscience Centeren
dc.type.urihttp://purl.org/eprint/type/JournalArticle
dc.date.updated2017-05-03T09:15:08Z
dc.type.coarjournal article
dc.description.reviewstatuspeerReviewed
dc.relation.issn2469-9926
dc.relation.numberinseries4
dc.relation.volume95
dc.type.versionpublishedVersion
dc.rights.copyright© 2017 American Physical Society. Published in this repository with the kind permission of the publisher.
dc.rights.accesslevelopenAccessfi
dc.relation.grantnumber275245
dc.relation.doi10.1103/PhysRevA.95.043604
dc.relation.funderSuomen Akatemiafi
dc.relation.funderAcademy of Finlanden
jyx.fundingprogramAkatemiatutkijan tehtävä, SAfi
jyx.fundingprogramResearch post as Academy Research Fellow, AoFen
jyx.fundinginformationThis work was supported by the German Research Foundation (DFG), the DFG Collaborative Research Centers SFB 925 and SFB/TR185, and by the Academy of Finland (Contract No. 275245).


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