https://doi.org/10.1140/epjc/s10052-017-5510-5
Regular Article - Theoretical Physics
On the effect of renormalization group improvement on the cosmological power spectrum
1
Department of Physics, University of Tehran, Tehran, Iran
2
Foundations of Physics Group, School of Physics, Institute for Research in Fundamental Sciences (IPM), Tehran, Iran
* e-mail: ashojai@ut.ac.ir
Received:
8
July
2017
Accepted:
26
December
2017
Published online:
15
January
2018
Asymptotically safe quantum gravity predicts running gravitational and cosmological constants, while it remains a meaningful quantum field theory because of the existence of a finite number of non-Gaussian ultraviolet fixed points. We have investigated the effect of such running couplings on the cosmological perturbations. We have obtained the improved Mukhanov–Sassaki equation and solved it for two models. The effect of such running of the coupling constants on the cosmological power spectrum is also studied.
© The Author(s), 2018
