Two-Scale Oscillons
Abstract
Oscillons are spatially stationary, quasi-periodic solutions of nonlinear field theories seen in settings ranging from granular systems, low temperature condensates and early universe cosmology. We describe a new class of oscillon in which the spatial envelope can have "off centre" maxima and pulsate on timescales much longer than the fundamental frequency. These are exact solutions of the 1-D sine-Gordon equation and we demonstrate numerically that similar solutions exist in up to three dimensions for a range of potentials. The dynamics of these solutions match key properties of oscillons that may form after cosmological inflation in string-motivated monodromy scenarios.
Keywords
Cite
@article{arxiv.1612.07228,
title = {Two-Scale Oscillons},
author = {Chang Liu and Richard Easther},
journal= {arXiv preprint arXiv:1612.07228},
year = {2017}
}
Comments
4 pages, figues; animations and further background at http://cosmology.blogs.auckland.ac.nz/2016/11/08/two-scale-oscillons/ v2: minor fixes