PIRSA:07050028 Conference Cosmology

DOI10.48660/07050028

Conference/School: Excursions in the Dark Workshop - 2007

Wetterich, C. (2007). Dark Energy from variation of the fundamental scale. Perimeter Institute. https://pirsa.org/07050028

Wetterich, Christof. Dark Energy from variation of the fundamental scale. Perimeter Institute, May. 18, 2007, https://pirsa.org/07050028 

@misc{ pirsa_PIRSA:07050028,
  doi = {10.48660/07050028},
  url = {https://pirsa.org/07050028},
  author = {Wetterich, Christof},
  keywords = {Cosmology},
  language = {en},
  title = {Dark Energy from variation of the fundamental scale},
  publisher = {Perimeter Institute},
  year = {2007},
  month = {may},
  note = {PIRSA:07050028 see, \url{https://pirsa.org}}
}

Abstract

We explore the hypothesis that a dynamical dark energy is related to a time-variation of the fundamental mass scale. A dilatation anomaly induced by quantum fluctuations could explain the small value of the present dark energy. Reformulated as a scalar field theory this would predict a quintessence potential which asymptotically relaxes to zero rather than to a nonvanishing constant. An observable consequence of such a scenario results in "early dark energy " contributing a few percent to the energy density of the Universe even at high redshift. Quintessence would be related to a new "fundamental" macroscopic force and induce a small time variation of fundamental constants.

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