OneLoop Quantum Gravity Repulsion in the Early Universe
Abstract
Perturbative quantum gravity formalism is applied to compute the lowest order corrections to the classical spatially flat cosmological FriedmannLemaîtreRobertsonWalker solution (for the radiation). The presented approach is analogous to the approach applied to compute quantum corrections to the Coulomb potential in electrodynamics, or rather to the approach applied to compute quantum corrections to the Schwarzschild solution in gravity. In the framework of the standard perturbative quantum gravity, it is shown that the corrections to the classical deceleration, coming from the oneloop graviton vacuum polarization (selfenergy), have (UV cutoff free) opposite to the classical repulsive properties which are not negligible in the very early Universe. The repulsive “quantum forces” resemble those known from loop quantum cosmology.
 Publication:

Physical Review Letters
 Pub Date:
 March 2011
 DOI:
 10.1103/PhysRevLett.106.101303
 arXiv:
 arXiv:1011.6257
 Bibcode:
 2011PhRvL.106j1303B
 Keywords:

 04.60.Gw;
 04.60.Bc;
 04.60.Pp;
 98.80.Qc;
 Covariant and sumoverhistories quantization;
 Phenomenology of quantum gravity;
 Loop quantum gravity quantum geometry spin foams;
 Quantum cosmology;
 General Relativity and Quantum Cosmology;
 Astrophysics  Cosmology and Extragalactic Astrophysics;
 High Energy Physics  Theory
 EPrint:
 8 pages, accepted version, dedicated to Jakub Rembielinski on the occasion of his 65th birthday