Two-Scale Oscillons

Chang Liu; Richard Easther

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arXiv · 1612.07228

Two-Scale Oscillons

Chang Liu·Richard Easther

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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.

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Chang Liu, Richard Easther. 2016-12-21. Two-Scale Oscillons. https://arxiv.org/abs/1612.07228

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