One-loop quantum corrections to cosmological scalar field potentials

Alexandre Arbey, Farvah Mahmoudi

Submitted on 6 March 2007


We study the loop corrections to potentials of complex or coupled real scalar fields used in cosmology to account for dark energy, dark matter or dark fluid. We show that the SUGRA quintessence and dark matter scalar field potentials are stable against the quantum fluctuations, and we propose solutions to the instability of the potentials of coupled quintessence and dark fluid scalar fields. We also find that a coupling to fermions is very restricted, unless this coupling has a structure which already exists in the scalar field potential or which can be compensated by higher order corrections. Finally, we study the influence of the curvature and kinetic term corrections.


Comment: 11 pages, 1 figure, accepted for publication in Phys. Rev. D

Subjects: High Energy Physics - Theory; Astrophysics; General Relativity and Quantum Cosmology