Dark Energy from Brane-world Gravity
摘要
Recent observations provide strong evidence that the universe is accelerating. This confronts theory with a severe challenge. Explanations of the acceleration within the framework of general relativity are plagued by difficulties. General relativistic models require a "dark energy" field with effectively negative pressure. An alternative to dark energy is that gravity itself may behave differently from general relativity on the largest scales, in such a way as to produce acceleration. The alternative approach of modified gravity also faces severe difficulties, but does provide a new angle on the problem. This review considers an example of modified gravity, provided by brane-world models that self-accelerate at late times.
引用
@article{arxiv.astro-ph/0602415,
title = {Dark Energy from Brane-world Gravity},
author = {Roy Maartens},
journal= {arXiv preprint arXiv:astro-ph/0602415},
year = {2008}
}
备注
Based on a talk at the 3rd Aegean Summer School, Chios, September 2005