Dark Energy Versus Modified Gravity

Austin Joyce, Lucas Lombriser, Fabian Schmidt

Research output: Contribution to journalLiterature reviewpeer-review


Understanding the reason for the observed accelerated expansion of the Universe represents one of the fundamental open questions in physics. In cosmology, a classification has emerged among physical models for this acceleration, distinguishing between dark energy and modified gravity. In this review, we provide a brief overview of models in both categories as well as their phenomenology and characteristic observable signatures in cosmology. We also introduce a rigorous distinction between dark energy and modified gravity based on the strong and weak equivalence principles.
Original languageEnglish
Pages (from-to)95-122
JournalAnnual Review of Nuclear and Particle Science
Issue number1
Publication statusPublished - 17 Jun 2016


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