IR quantum gravity solves naturally cosmic acceleration and its coincidence problem

Fotios K. Anagnostopoulos, Georgios Kofinas, Vasilios Zarikas

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)


The novel idea is that the undergoing accelerated expansion of the universe happens due to infrared quantum gravity modifications at intermediate astrophysical scales of galaxies or galaxy clusters, within the framework of Asymptotically Safe gravity. The reason is that structures of matter are associated with a scale-dependent positive cosmological constant of quantum origin. In this context, no extra unproven energy scales or fine-tuning are used. Furthermore, this model was confronted with the most recent observational data from a variety of probes, and with the aid of Bayesian analysis, the most probable values of the free parameters were extracted. Finally, the model proved to be statistically equivalent with NCDM, and thus being able to resolve naturally the concept of dark energy and its associated cosmic coincidence problem.

Original languageEnglish
Article number1944013
JournalInternational Journal of Modern Physics D
Issue number14
Publication statusAccepted/In press - Jan 1 2019


  • asymptotic safety
  • coincidence problem
  • Dark energy
  • galaxies
  • galaxy clusters
  • infrared fixed point

ASJC Scopus subject areas

  • Mathematical Physics
  • Astronomy and Astrophysics
  • Space and Planetary Science

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