PIRSA:08020046 Scientific Series Cosmology

DOI10.48660/08020046

Series: Cosmology and Gravitation

Dubovsky, S. (2008). The Accelerating Universe: Landscape or Modified Gravity?. Perimeter Institute. https://pirsa.org/08020046

Dubovsky, Sergei. The Accelerating Universe: Landscape or Modified Gravity?. Perimeter Institute, Feb. 28, 2008, https://pirsa.org/08020046 

@misc{ pirsa_PIRSA:08020046,
  doi = {10.48660/08020046},
  url = {https://pirsa.org/08020046},
  author = {Dubovsky, Sergei},
  keywords = {Cosmology},
  language = {en},
  title = {The Accelerating Universe: Landscape or Modified Gravity?},
  publisher = {Perimeter Institute},
  year = {2008},
  month = {feb},
  note = {PIRSA:08020046 see, \url{https://pirsa.org}}
}

Abstract

The most remarkable recent discovery in fundamental physics is that the Universe is undergoing accelerated expansion. A proper understanding of its physical origin forces us to make a hard choice between dynamical and environmental scenarios. The former approach predicts the existence of a new long distance physics in the gravitational sector, while the second relies on the vast landscape of vacua with different values of the cosmological constant. I will discuss achievements and shortcomings of both approaches, and illustrate them in the concrete examples.

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