Show simple item record

dc.contributor.authorWitczak-Krempa, William
dc.contributor.authorSørensen, Erik S.
dc.contributor.authorSachdev, Subir
dc.date.accessioned2014-09-16T13:23:11Z
dash.embargo.terms2014-09-24
dc.date.issued2014
dc.identifier.citationWitczak-Krempa, William, Erik S. Sørensen, and Subir Sachdev. 2014. The Dynamics of Quantum Criticality Revealed by Quantum Monte Carlo and Holography. Nature Physics 10, no. 5: 361–366.en_US
dc.identifier.issn1745-2473en_US
dc.identifier.issn1745-2481en_US
dc.identifier.urihttp://nrs.harvard.edu/urn-3:HUL.InstRepos:12872196
dc.description.abstractUnderstanding the dynamics of quantum systems without long-lived excitations (quasiparticles) constitutes an important yet challenging problem. Although numerical techniques can yield results for the dynamics in imaginary time, their reliable continuation to real time has proved difficult. We tackle this issue using the superfluid–insulator quantum critical point of bosons on a two-dimensional lattice, where quantum fluctuations destroy quasiparticles. We present quantum Monte Carlo simulations for two separate lattice realizations. Their low-frequency conductivities turn out to have the same universal dependence on imaginary frequency and temperature. Using the structure of the real-time dynamics of conformal field theories described by the holographic gauge/gravity duality, we then make progress on the problem of analytically continuing the numerical data to real time. Our method yields quantitative and experimentally testable results on the frequency-dependent conductivity near the quantum critical point. Extensions to other observables and universality classes are discussed.en_US
dc.description.sponsorshipPhysicsen_US
dc.language.isoen_USen_US
dc.publisherNature Publishing Groupen_US
dc.relation.isversionofdoi:10.1038/nphys2913en_US
dash.licenseLAA
dc.titleThe Dynamics of Quantum Criticality Revealed by Quantum Monte Carlo and Holographyen_US
dc.typeJournal Articleen_US
dc.description.versionAccepted Manuscripten_US
dc.relation.journalNature Physicsen_US
dash.depositing.authorSachdev, Subir
dash.waiver2014-01-29
dc.date.available2014-09-24T07:30:55Z
dc.identifier.doi10.1038/nphys2913*
workflow.legacycommentsFrom Waiver Table. Can be posted after six month embargo. per nature site, published online 23 March 2014.en_US
dash.contributor.affiliatedSachdev, Subir


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record