Modified Dispersion Relations from Closed Strings in Toroidal Cosmology
高能物理 - 理论
2011-07-19 v3 天体物理学
广义相对论与量子宇宙学
高能物理 - 唯象学
摘要
A long-standing problem of theoretical physics is the exceptionally small value of the cosmological constant measured in natural Planckian units. Here we derive this tiny number from a toroidal string cosmology based on closed strings. In this picture the dark energy arises from the correlation between momentum and winding modes that for short distances has an exponential fall-off with increasing values of the momenta.The freeze-out by the expansion of the background universe for these transplanckian modes may be interpreted as a frozen condensate of the closed-string modes in the three non-compactified spatial dimensions.
引用
@article{arxiv.hep-th/0110167,
title = {Modified Dispersion Relations from Closed Strings in Toroidal Cosmology},
author = {Mar Bastero-Gil and Paul H. Frampton and Laura Mersini},
journal= {arXiv preprint arXiv:hep-th/0110167},
year = {2011}
}
备注
21 pages LaTeX. Clarification at end of Section 3. Modified Discussion Section. Two notes added. Title changed