One-loop 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 FLRW 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 one-loop graviton vacuum polarization (self-energy), 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.

8 pages, accepted version, dedicated to Jakub Rembielinski on the occasion of his 65th birthday

References in corpus (2)

• Leading Quantum Correction to the Newtonian Potential
• Complementarity of the Maldacena and Randall-Sundrum Pictures

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