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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