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arxiv: 0906.3860 · v1 · submitted 2009-06-21 · 🌀 gr-qc

Power-law cosmic expansion in f(R) gravity models

classification 🌀 gr-qc
keywords gravitypower-lawsolutionsclasscosmiccosmologicalexactexist
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We show that within the class of f(R) gravity theories, FLRW power-law perfect fluid solutions only exist for R^n gravity. This significantly restricts the set of exact cosmological solutions which have similar properties to what is found in standard General Relativity.

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