PIRSA:19060040 Scientific Series Cosmology

DOI10.48660/19060040

Series: Cosmology and Gravitation

Mukohyama, S. (2019). Minimalism in modified gravity. Perimeter Institute. https://pirsa.org/19060040

Mukohyama, Shinji. Minimalism in modified gravity. Perimeter Institute, Jun. 25, 2019, https://pirsa.org/19060040 

@misc{ pirsa_PIRSA:19060040,
  doi = {10.48660/19060040},
  url = {https://pirsa.org/19060040},
  author = {Mukohyama, Shinji},
  keywords = {Cosmology},
  language = {en},
  title = {Minimalism in modified gravity},
  publisher = {Perimeter Institute},
  year = {2019},
  month = {jun},
  note = {PIRSA:19060040 see, \url{https://pirsa.org}}
}

Abstract

It is generally believed that modification of general relativity inevitably introduce extra physical degree(s) of freedom.
In this talk I argue that this is not the case by constructing modified gravity theories with two local physical degrees of freedom. After classifying such theories into two types, I show explicit examples and discuss their cosmology and phenomenology.

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