PIRSA:10050009 Scientific Series Cosmology

DOI10.48660/10050009

Series: Cosmology and Gravitation

Peter, P. (2010). Bouncing alternatives to inflation. Perimeter Institute. https://pirsa.org/10050009

Peter, Patrick. Bouncing alternatives to inflation. Perimeter Institute, May. 11, 2010, https://pirsa.org/10050009 

@misc{ pirsa_PIRSA:10050009,
  doi = {10.48660/10050009},
  url = {https://pirsa.org/10050009},
  author = {Peter, Patrick},
  keywords = {Cosmology},
  language = {en},
  title = {Bouncing alternatives to inflation},
  publisher = {Perimeter Institute},
  year = {2010},
  month = {may},
  note = {PIRSA:10050009 see, \url{https://pirsa.org}}
}

Abstract

Although inflation is, by far, the best known mechanism to explain the observed properties of our Universe, there is still some room for alternative models, most of which implying a contracting phase preceding the current expanding one. Both phases are connected by a bounce at which the expansion rate must vanish. General relativity can only produce such a phase provided the spatial curvature is positive, in contradiction with the current observations. I will discuss the lines along which one can modify either the matter or the gravity sector (or both) in order to implement a bounce, and show the generic observable cosmological consequences it can induce, in particular in the microwave background.

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