Marko Ljubotina (Author), Marko Žnidarič (Author), Tomaž Prosen (Author)

Abstract

Equilibrium spatiotemporal correlation functions are central to understanding weak nonequilibrium physics. In certain local one-dimensional classical systems with three conservation laws they show universal features. Namely, fluctuations around ballistically propagating sound modes can be described by the celebrated Kardar-Parisi-Zhang (KPZ) universality class. Can such a universality class be found also in quantum systems? By unambiguously demonstrating that the KPZ scaling function describes magnetization dynamics in the SU(2) symmetric Heisenberg spin chain we show, for the first time, that this is so. We achieve that by introducing new theoretical and numerical tools, and make a puzzling observation that the conservation of energy does not seem to matter for the KPZ physics.

Keywords

kvantna statistična mehanika;quantum statistical mechanics;

Data

Language: English
Year of publishing:
Typology: 1.01 - Original Scientific Article
Organization: UL FMF - Faculty of Mathematics and Physics
UDC: 536.93
COBISS: 3366756 Link will open in a new window
ISSN: 0031-9007
Views: 761
Downloads: 528
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Other data

Secondary language: Slovenian
Secondary keywords: kvantna statistična mehanika;
Pages: str. 210602-1-210602-6
Volume: ǂVol. ǂ122
Issue: ǂiss. ǂ21
Chronology: 2019
DOI: 10.1103/PhysRevLett.122.210602
ID: 11238035