PIRSA:11070028

Video URL

https://pirsa.org/11070028

Does the Cyclic Universe Avoid the Measure Problem?

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

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

          @misc{ scivideos_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 for Theoretical Physics},
            year = {2011},
            month = {jul},
            note = {PIRSA:11070028 see, \url{https://scivideos.org/pirsa/11070028}}
          }

Jean-Luc Lehners Koehn AI

Talk numberPIRSA:11070028
DOI10.48660/11070028
Source RepositoryPIRSA
Collection
Talk Type Conference
Subject

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.