Self-Tracking Solutions for Asymptotic Scalar Fields
High Energy Physics - Theory
2025-08-19 v2 Cosmology and Nongalactic Astrophysics
General Relativity and Quantum Cosmology
Abstract
We explore the dynamics of pure scalar fields rolling on an exponential potential in the absence of any additional background fluid and demonstrate the existence of self-tracking solutions in which the self-perturbations of the scalar field act as an effective radiation background. The validity of these solutions is demonstrated through both analytic techniques and numerical simulations using CosmoLattice. We discuss applications to string cosmologies with significant trans-Planckian field excursions between inflation and BBN, including the required initial level of scalar perturbations to avoid overshoot.
Keywords
Cite
@article{arxiv.2507.04161,
title = {Self-Tracking Solutions for Asymptotic Scalar Fields},
author = {Martin Mosny and Joseph P. Conlon and Edmund J. Copeland},
journal= {arXiv preprint arXiv:2507.04161},
year = {2025}
}