New accelerating solutions in late-time cosmology
General Relativity and Quantum Cosmology
2020-05-27 v1 Cosmology and Nongalactic Astrophysics
High Energy Physics - Theory
Abstract
Dark energy models can be seen as dynamical systems. In this paper we show that multi-field models with a curved field space give rise to new critical points and we analyse their stability. These are new accelerating solutions in late-time cosmology which exist even for steep potentials. This opens up the possibility to realise quintessence models even when quantum corrections spoil the flatness of the underlying potential. These non-linear sigma models arise naturally in supergravity and string models where their multi-field dynamics can help to avoid swampland bounds.
Keywords
Cite
@article{arxiv.2002.02695,
title = {New accelerating solutions in late-time cosmology},
author = {Michele Cicoli and Giuseppe Dibitetto and Francisco G. Pedro},
journal= {arXiv preprint arXiv:2002.02695},
year = {2020}
}