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On the low-energy description for tunnel-coupled one-dimensional Bose gases

by Yuri D van Nieuwkerk, Fabian H L Essler

Submission summary

As Contributors: Fabian Essler · Yuri Daniel van Nieuwkerk
Preprint link: scipost_202005_00003v1
Date submitted: 2020-05-08
Submitted by: van Nieuwkerk, Yuri Daniel
Submitted to: SciPost Physics
Discipline: Physics
Subject area: Condensed Matter Physics - Theory
Approach: Theoretical

Abstract

We consider a model of two tunnel-coupled one-dimensional Bose gases with hard-wall boundary conditions. Bosonizing the model and retaining only the most relevant interactions leads to a decoupled theory consisting of a quantum sine-Gordon model and a free boson, describing respectively the antisymmetric and symmetric combinations of the phase fields. We go beyond this description by retaining the perturbation with the next smallest scaling dimension. This perturbation carries conformal spin and couples the two sectors. We carry out a detailed investigation of the effects of this coupling on the non-equilibrium dynamics of the model. We focus in particular on the role played by spatial inhomogeneities in the initial state in a quantum quench setup.

Current status:
Editor-in-charge assigned


Submission & Refereeing History

Resubmission scipost_202005_00003v1 on 8 May 2020
Submission 2003.07873v1 on 19 March 2020

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