We briefly review the need to perform renormalization of inflationary perturbations to properly work out the physical power spectra. We also summarize the basis of (momentum-space) renormalization in curved spacetime and address several misconceptions found in recent literature on this subject. © 2011 American Physical Society.
Publication Source (Journal or Book title)
Physical Review D - Particles, Fields, Gravitation and Cosmology
Agullo, I., Navarro-Salas, J., Olmo, G., & Parker, L. (2011). Remarks on the renormalization of primordial cosmological perturbations. Physical Review D - Particles, Fields, Gravitation and Cosmology, 84 (10) https://doi.org/10.1103/PhysRevD.84.107304