PIRSA:11070028 Conference Cosmology

DOI10.48660/11070028

Conference/School: Challenges for Early Universe Cosmology - 2011

Lehners, J. (2011). Does the Cyclic Universe Avoid the Measure Problem?. Perimeter Institute. https://pirsa.org/11070028

Lehners, Jean-Luc. Does the Cyclic Universe Avoid the Measure Problem?. Perimeter Institute, Jul. 13, 2011, https://pirsa.org/11070028 

@misc{ pirsa_PIRSA:11070028,
  doi = {10.48660/11070028},
  url = {https://pirsa.org/11070028},
  author = {Lehners, Jean-Luc},
  keywords = {Cosmology},
  language = {en},
  title = {Does the Cyclic Universe Avoid the Measure Problem?},
  publisher = {Perimeter Institute},
  year = {2011},
  month = {jul},
  note = {PIRSA:11070028 see, \url{https://pirsa.org}}
}

Abstract

In its best understood version, the Steinhardt-Turok cyclic universe contains two crucial ingredients: an unstable field trajectory during the ekpyrotic phase, and the subsequent brane collision corresponding to the crunch/bang transition. These two features act as strong selection principles and determine the broad physical properties of the universe emerging from the bang. As such, they significantly alleviate (and perhaps resolve) the measure problem that is inherent to all cosmological models that produce universes with a range of physical properties.

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