Cosmic bounce and phantom-like equation of state from tunnelling
High Energy Physics - Theory
2023-06-07 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Abstract
We allow a scalar field on a flat FLRW background metric to tunnel between two degenerate vacua. The resulting true vacuum state then violates the Null Energy Condition, and the corresponding homogeneous fluid induces a bounce, after which it has a phantom-like equation of state and asymptotically leads to a de Sitter phase. The mechanism presented here requires no exotic matter or modified gravity, it is purely generated by quantum fluctuations and is valid for a generic double well potential.
Keywords
Cite
@article{arxiv.2301.08652,
title = {Cosmic bounce and phantom-like equation of state from tunnelling},
author = {Jean Alexandre and Silvia Pla},
journal= {arXiv preprint arXiv:2301.08652},
year = {2023}
}
Comments
Comments added; 22 pages, 3 figures