Renormalization-group techniques for single-field inflation in primordial cosmology and quantum gravity

@article{Anselmi2021RenormalizationgroupTF,
  title={Renormalization-group techniques for single-field inflation in primordial cosmology and quantum gravity},
  author={Damiano Anselmi and Filippo Fruzza and Marco Piva},
  journal={Classical and Quantum Gravity},
  year={2021},
  volume={38}
}
We study inflation as a ‘cosmic’ renormalization-group (RG) flow. The flow, which encodes the dependence on the background metric, is described by a running coupling α, which parametrizes the slow roll, a de Sitter free, analytic beta function and perturbation spectra that are RG invariant in the superhorizon limit. Using RG invariance as a guiding principle, we classify the main types of flows according to the properties of their spectra, without referring to their origins from specific… 
1 Citations
Perturbation spectra and renormalization-group techniques in double-field inflation and quantum gravity cosmology
  • D. Anselmi
  • Physics
    Journal of Cosmology and Astroparticle Physics
  • 2021
We study primordial cosmology with two scalar fields that participate in inflation at the same time, by coupling quantum gravity (i.e., the theory R+R2+C2 with the fakeon prescription/projection for

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