Stochastic hydrodynamics and long time tails of an expanding conformal charged fluid
Abstract
We investigate the impact of hydrodynamic fluctuations on correlation functions in a scale invariant fluid with a conserved U(1) charge. The kinetic equations for the two-point functions of pressure, momentum, and heat energy densities are derived within the framework of stochastic hydrodynamics. The leading nonanalytic contributions to the energy-momentum tensor as well as the U(1) current are determined from the solutions to these kinetic equations. In the case of a static homogeneous background we show that the long time tails obtained from hydrokinetic equations reproduce the one-loop results derived from statistical field theory. We use these results to establish bounds on transport coefficients. We generalize the stochastic equation to a background flow undergoing Bjorken expansion. We compute the leading fractional power O((τT)–3/2) correction to the U(1) current and compare with the first-order gradient term.
- Authors:
- Publication Date:
- Research Org.:
- North Carolina State Univ., Raleigh, NC (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP)
- OSTI Identifier:
- 1511074
- Alternate Identifier(s):
- OSTI ID: 1511003
- Grant/Contract Number:
- FG02-03ER41260
- Resource Type:
- Published Article
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Name: Physical Review C Journal Volume: 99 Journal Issue: 5; Journal ID: ISSN 2469-9985
- Publisher:
- American Physical Society
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; Hydrodynamic fluctuations; Stochastic Hydrodynamics
Citation Formats
Martinez, M., and Schäfer, T. Stochastic hydrodynamics and long time tails of an expanding conformal charged fluid. United States: N. p., 2019.
Web. doi:10.1103/PhysRevC.99.054902.
Martinez, M., & Schäfer, T. Stochastic hydrodynamics and long time tails of an expanding conformal charged fluid. United States. doi:10.1103/PhysRevC.99.054902.
Martinez, M., and Schäfer, T. Mon .
"Stochastic hydrodynamics and long time tails of an expanding conformal charged fluid". United States. doi:10.1103/PhysRevC.99.054902.
@article{osti_1511074,
title = {Stochastic hydrodynamics and long time tails of an expanding conformal charged fluid},
author = {Martinez, M. and Schäfer, T.},
abstractNote = {We investigate the impact of hydrodynamic fluctuations on correlation functions in a scale invariant fluid with a conserved U(1) charge. The kinetic equations for the two-point functions of pressure, momentum, and heat energy densities are derived within the framework of stochastic hydrodynamics. The leading nonanalytic contributions to the energy-momentum tensor as well as the U(1) current are determined from the solutions to these kinetic equations. In the case of a static homogeneous background we show that the long time tails obtained from hydrokinetic equations reproduce the one-loop results derived from statistical field theory. We use these results to establish bounds on transport coefficients. We generalize the stochastic equation to a background flow undergoing Bjorken expansion. We compute the leading fractional power O((τT)–3/2) correction to the U(1) current and compare with the first-order gradient term.},
doi = {10.1103/PhysRevC.99.054902},
journal = {Physical Review C},
number = 5,
volume = 99,
place = {United States},
year = {2019},
month = {5}
}
DOI: 10.1103/PhysRevC.99.054902
Web of Science
Figures / Tables:

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Works referencing / citing this record:
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