6533b7d8fe1ef96bd126af1d
RESEARCH PRODUCT
From Big Bang to Asymptotic de Sitter: Complete Cosmologies in a Quantum Gravity Framework
Frank SaueressigMartin Reutersubject
High Energy Physics - TheoryBig BangInflation (cosmology)Physicsmedia_common.quotation_subjectAstrophysics (astro-ph)FOS: Physical sciencesAstronomy and AstrophysicsRenormalization groupAstrophysicsUniverseGravitationGeneral Relativity and Quantum CosmologyHigh Energy Physics - Theory (hep-th)De Sitter universeQuantum gravityQuantumMathematical physicsmedia_commondescription
Using the Einstein-Hilbert approximation of asymptotically safe quantum gravity we present a consistent renormalization group based framework for the inclusion of quantum gravitational effects into the cosmological field equations. Relating the renormalization group scale to cosmological time via a dynamical cutoff identification this framework applies to all stages of the cosmological evolution. The very early universe is found to contain a period of ``oscillatory inflation'' with an infinite sequence of time intervals during which the expansion alternates between acceleration and deceleration. For asymptotically late times we identify a mechanism which prevents the universe from leaving the domain of validity of the Einstein-Hilbert approximation and obtain a classical de Sitter era.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2005-07-18 |