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dc.contributor.authorPowell, Stephen
dc.contributor.authorSachdev, Subir
dc.date.accessioned2019-09-27T13:20:48Z
dc.date.issued2007
dc.identifier.citationPowell, Stephen, and Subir Sachdev. 2007. “Spin Dynamics across the Superfluid-Insulator Transition of Spinful Bosons.” Physical Review A 76 (3). https://doi.org/10.1103/physreva.76.033612.
dc.identifier.issn1050-2947
dc.identifier.issn1094-1622
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:41417420*
dc.description.abstractBosons with nonzero spin exhibit a rich variety of superfluid and insulating phases. Most phases support coherent spin oscillations, which have been the focus of numerous recent experiments. These spin oscillations are Rabi oscillations between discrete levels deep in the insulator, while deep in the superfluid they can be oscillations in the orientation of a spinful condensate. We describe the evolution of spin oscillations across the superfluid-insulator quantum phase transition. For transitions with an order parameter carrying spin, the damping of such oscillations is determined by the scaling dimension of the composite spin operator. For transitions with a spinless order parameter and gapped spin excitations, we demonstrate that the damping is determined by an associated quantum impurity problem of a localized spin excitation interacting with the bulk critical modes. We present a renormalization group analysis of the quantum impurity problem and discuss the relationship of our results to experiments on ultracold atoms in optical lattices.
dc.language.isoen_US
dc.publisherAmerican Physical Society
dash.licenseLAA
dc.titleSpin dynamics across the superfluid-insulator transition of spinful bosons
dc.typeJournal Article
dc.description.versionAccepted Manuscript
dc.relation.journalPhysical Review A - Atomic, Molecular, and Optical Physics
dash.depositing.authorSachdev, Subir::01f180804aa3dee76221c3e9d66397f5::600
dc.date.available2019-09-27T13:20:48Z
dash.workflow.comments1Science Serial ID 75964
dc.identifier.doi10.1103/PhysRevA.76.033612
dash.source.volume76;3


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