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An effective action for asymptotically safe gravity

Alfio Bonanno

  • INAF, Osservatorio Astrofisico di Catania, Via S.Sofia 78, 95123 Catania, Italy
  • INFN, Sezione di Catania, Via S.Sofia 72, 95123 Catania, Italy

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Phys. Rev. D 85, 081503(R) – Published 9 April, 2012

DOI: https://doi.org/10.1103/PhysRevD.85.081503

Abstract

Asymptotically safe theories of gravitation have received great attention in recent times. In this framework an effective action embodying the basic features of the renormalized flow around the non-Gaussian fixed-point is derived and its implications for the early universe are discussed. In particular, a landscape of a countably infinite number of cosmological inflationary solutions characterized by an unstable de Sitter phase lasting for a large enough number of e-folds is found.

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Phys. Rev. D 85, 081503(R)– Published 9 April, 2012
  • Received 15 September 2011

© 2012 American Physical Society

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