A cosmological constant from the QCD trace anomaly?
General Relativity and Quantum Cosmology
2009-11-07 v1
Abstract
According to recent astrophysical observations the large scale mean pressure of our present universe is negative suggesting a positive cosmological constant like term. This article addresses the question of whether non-perturbative effects of self-interacting quantum fields in curved space-times may yield a significant contribution. Focusing on the trace anomaly of quantum chromo-dynamics (QCD), a preliminary estimate of the expected order of magnitude yields a remarkable coincidence with the empirical data, indicating the potential relevance of this effect. PACS: 04.62.+v, 12.38.Aw, 12.38.Lg, 98.80.Es.
Cite
@article{arxiv.gr-qc/0204018,
title = {A cosmological constant from the QCD trace anomaly?},
author = {Ralf Schützhold},
journal= {arXiv preprint arXiv:gr-qc/0204018},
year = {2009}
}
Comments
4 pages, RevTeX