skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Non-conformal evolution of magnetic fields during reheating

Abstract

We consider the evolution of electromagnetic fields coupled to conduction currents during the reheating era after inflation, and prior to the establishing of the proton-electron plasma. We assume that the currents may be described by second order causal hydrodynamics. The resulting theory is not conformally invariant. The expansion of the Universe produces temperature gradients which couple to the current and generally oppose Ohmic dissipation. Although the effect is not strong, it suggests that the unfolding of hydrodynamic instabilities in these models may follow a different pattern than in first order theories, and even than in second order theories on non expanding backgrounds.

Authors:
 [1];  [2]
  1. Departamento de Física and IFIBA, FCEyN—Universidad de Buenos Aires, Ciudad Universitaria, CABA (Argentina)
  2. LATO, DCET—Universidade Estadual de Santa Cruz, Rodovia Ilhéus-Itabuna km 16 s/n, Ilhéus, BA (Brazil)
Publication Date:
OSTI Identifier:
22525927
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Cosmology and Astroparticle Physics; Journal Volume: 2015; Journal Issue: 03; Other Information: Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
79 ASTROPHYSICS, COSMOLOGY AND ASTRONOMY; COSMOLOGICAL INFLATION; ELECTROMAGNETIC FIELDS; ELECTRONS; GALACTIC EVOLUTION; HYDRODYNAMICS; INSTABILITY; MAGNETIC FIELDS; PLASMA; PROTONS; TEMPERATURE GRADIENTS; UNIVERSE

Citation Formats

Calzetta, Esteban, and Kandus, Alejandra, E-mail: calzetta@df.uba.ar, E-mail: kandus@uesc.br. Non-conformal evolution of magnetic fields during reheating. United States: N. p., 2015. Web. doi:10.1088/1475-7516/2015/03/045.
Calzetta, Esteban, & Kandus, Alejandra, E-mail: calzetta@df.uba.ar, E-mail: kandus@uesc.br. Non-conformal evolution of magnetic fields during reheating. United States. doi:10.1088/1475-7516/2015/03/045.
Calzetta, Esteban, and Kandus, Alejandra, E-mail: calzetta@df.uba.ar, E-mail: kandus@uesc.br. Sun . "Non-conformal evolution of magnetic fields during reheating". United States. doi:10.1088/1475-7516/2015/03/045.
@article{osti_22525927,
title = {Non-conformal evolution of magnetic fields during reheating},
author = {Calzetta, Esteban and Kandus, Alejandra, E-mail: calzetta@df.uba.ar, E-mail: kandus@uesc.br},
abstractNote = {We consider the evolution of electromagnetic fields coupled to conduction currents during the reheating era after inflation, and prior to the establishing of the proton-electron plasma. We assume that the currents may be described by second order causal hydrodynamics. The resulting theory is not conformally invariant. The expansion of the Universe produces temperature gradients which couple to the current and generally oppose Ohmic dissipation. Although the effect is not strong, it suggests that the unfolding of hydrodynamic instabilities in these models may follow a different pattern than in first order theories, and even than in second order theories on non expanding backgrounds.},
doi = {10.1088/1475-7516/2015/03/045},
journal = {Journal of Cosmology and Astroparticle Physics},
number = 03,
volume = 2015,
place = {United States},
year = {Sun Mar 01 00:00:00 EST 2015},
month = {Sun Mar 01 00:00:00 EST 2015}
}