Dark Energy vs. Modified Gravity

  title={Dark Energy vs. Modified Gravity},
  author={Austin Joyce and Lucas Lombriser and Fabian Schmidt},
  journal={arXiv: Cosmology and Nongalactic Astrophysics},
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 the acceleration, distinguishing between Dark Energy and Modified Gravity. In this review, we give 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… Expand

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