A compelling unified model of dark energy and early dark energy (EDE) is presented, using a scalar field with an exponential runaway potential, in the context of alpha-attractors. The field is originally trapped at an enhanced symmetry point, subsequently thaws to become successful EDE and eventually slow-rolls to become dark energy. EDE ameliorates the observed Hubble tension.
@article{arxiv.2303.15523,
title = {Explaining the Hubble tension and dark energy from alpha-attractors},
author = {Lucy Brissenden and Konstantinos Dimopoulos and Samuel Sánchez López},
journal= {arXiv preprint arXiv:2303.15523},
year = {2023}
}
Comments
12 pages, 4 figures, contribution to proceedings of: Corfu Summer Institute 2022 "School and Workshops on Elementary Particle Physics and Gravity", 28 August - 1 October, 2022, Corfu, Greece