Isotropization of a rotating and longitudinally expanding $\phi^4$ scalar system
High Energy Physics - Theory
2022-11-08 v1
Abstract
We present numerical simulations for the evolution of an expanding system of massless scalar fields with quartic coupling. By setting a rotating, non-isotropic initial configuration, we compute the energy density, the transverse and longitudinal pressures and the angular momentum of the system. We compare the time scales associated with the isotropization and the decay of the initial angular momentum due to the expansion, and show that even for fairly large initial angular momentum, it decays significantly faster than the pressure anisotropy.
Keywords
Cite
@article{arxiv.2210.05504,
title = {Isotropization of a rotating and longitudinally expanding $\phi^4$ scalar system},
author = {Margaret E. Carrington and Gabor Kunstatter and Christopher Phillips and Marcelo E. Rubio},
journal= {arXiv preprint arXiv:2210.05504},
year = {2022}
}
Comments
15 pages, 6 figures