Hydrodynamics of nonintegrable systems from a relaxation-time
approximation
- URL: http://arxiv.org/abs/2005.13546v3
- Date: Sun, 28 Feb 2021 19:53:31 GMT
- Title: Hydrodynamics of nonintegrable systems from a relaxation-time
approximation
- Authors: Javier Lopez-Piqueres, Brayden Ware, Sarang Gopalakrishnan, Romain
Vasseur
- Abstract summary: We develop a general kinetic theory framework to describe the hydrodynamics of strongly interacting, nonequilibrium quantum systems.
It gives a simple, but surprisingly accurate, prescription for computing nonequilibrium transport even in strongly interacting systems.
- Score: 0.0
- License: http://arxiv.org/licenses/nonexclusive-distrib/1.0/
- Abstract: We develop a general kinetic theory framework to describe the hydrodynamics
of strongly interacting, nonequilibrium quantum systems in which integrability
is weakly broken, leaving a few residual conserved quantities. This framework
is based on a generalized relaxation-time approximation; it gives a simple, but
surprisingly accurate, prescription for computing nonequilibrium transport even
in strongly interacting systems. This approximation reproduces the crossover
from generalized to conventional hydrodynamics in interacting one-dimensional
Bose gases with integrability-breaking perturbations, both with and without
momentum conservation. It also predicts the hydrodynamics of chaotic quantum
spin chains, in good agreement with matrix product operator calculations.
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