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. © 2007 Springer-Verlag Berlin Heidelberg.
CITATION STYLE
Maartens, R. (2007). Dark energy from brane-world gravity. Lecture Notes in Physics. https://doi.org/10.1007/978-3-540-71013-4_11
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