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Diffusive Heat Waves in Random Conformal Field Theory
KTH, School of Engineering Sciences (SCI), Physics, Condensed Matter Theory.ORCID iD: 0000-0001-7481-2245
KTH, School of Engineering Sciences (SCI), Physics, Condensed Matter Theory.ORCID iD: 0000-0003-0011-2937
2019 (English)In: Physical Review Letters, ISSN 0031-9007, E-ISSN 1079-7114, Vol. 122, no 2, article id 020201Article in journal (Refereed) Published
Abstract [en]

We propose and study a conformal field theory (CFT) model with random position-dependent velocity that, as we argue, naturally emerges as an effective description of heat transport in one-dimensional quantum many-body systems with certain static random impurities. We present exact analytical results that elucidate how purely ballistic heat waves in standard CFT can acquire normal and anomalous diffusive contributions due to our impurities. Our results include impurity-averaged Green's functions describing the time evolution of the energy density and the heat current, and an explicit formula for the thermal conductivity that, in addition to a universal Drude peak, has a nontrivial real regular contribution that depends on details of the impurities.

Place, publisher, year, edition, pages
AMER PHYSICAL SOC , 2019. Vol. 122, no 2, article id 020201
National Category
Condensed Matter Physics
Identifiers
URN: urn:nbn:se:kth:diva-243955DOI: 10.1103/PhysRevLett.122.020201ISI: 000456041800001PubMedID: 30720322Scopus ID: 2-s2.0-85060652301OAI: oai:DiVA.org:kth-243955DiVA, id: diva2:1293230
Funder
Swedish Research Council, 2016-05167
Note

QC 20190304

Available from: 2019-03-04 Created: 2019-03-04 Last updated: 2019-06-26Bibliographically approved

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Langmann, EdwinMoosavi, Per

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