Dark Energy from Quantum Matter
Cosmology and Nongalactic Astrophysics
2010-07-29 v1 General Relativity and Quantum Cosmology
High Energy Physics - Theory
Abstract
We study the backreaction of free quantum fields on a flat Robertson-Walker spacetime. Apart from renormalization freedom, the vacuum energy receives contributions from both the trace anomaly and the thermal nature of the quantum state. The former represents a dynamical realisation of dark energy, while the latter mimics an effective dark matter component. The semiclassical dynamics yield two classes of asymptotically stable solutions. The first reproduces the concordance model in a suitable regime. The second lacks a classical counterpart, but is in excellent agreement with recent observations.
Keywords
Cite
@article{arxiv.1007.5009,
title = {Dark Energy from Quantum Matter},
author = {Claudio Dappiaggi and Thomas-Paul Hack and Jan Möller and Nicola Pinamonti},
journal= {arXiv preprint arXiv:1007.5009},
year = {2010}
}
Comments
4 pages, 3 figures