PIRSA:07050028

Video URL

https://pirsa.org/07050028

Dark Energy from variation of the fundamental scale

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

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

          @misc{ scivideos_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 for Theoretical Physics},
            year = {2007},
            month = {may},
            note = {PIRSA:07050028 see, \url{https://scivideos.org/pirsa/07050028}}
          }

Christof Wetterich Universität Heidelberg

Talk numberPIRSA:07050028
DOI10.48660/07050028
Source RepositoryPIRSA
Collection
Talk Type Conference
Subject

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.