Kinetics of mobile impurities and correlation functions in one-dimensional superfluids at finite temperature

We examine the hydrodynamic approach to dynamical correlations in one-dimensional superfluids near integrability and calculate the characteristic time scale, τ, beyond which this approach is valid. For time scales shorter than τ, hydrodynamics fails, and we develop an approach based on kinetics of f...

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Bibliographic Details
Published in:	Physical review letters Vol. 112; no. 17; p. 170602
Main Authors:	Arzamasovs, M, Bovo, F, Gangardt, D M
Format:	Journal Article
Language:	English
Published:	United States 02-05-2014
Subjects:	Correlation Fluid dynamics Fluid flow Fluids Hydrodynamics Impurities Mathematical analysis Time
Online Access:	Get full text
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Summary:	We examine the hydrodynamic approach to dynamical correlations in one-dimensional superfluids near integrability and calculate the characteristic time scale, τ, beyond which this approach is valid. For time scales shorter than τ, hydrodynamics fails, and we develop an approach based on kinetics of fermionic quasiparticles described as mobile impurities. New universal results for the dynamical structure factor relevant to experiments in ultracold atomic gases are obtained.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.112.170602