Stabilizing the Planck mass shortly after inflation

2015/03/31 by Carsten van de Bruck, Adam J. Christopherson, M Robinson +1
Mathematics · Physics and Astronomy · #Adiabatic process #Amplitude #Astrophysics #Black Holes and Theoretical Physics #Classical mechanics #Cosmology and Gravitation Theories #Curvature #Gravitation #Inflation (cosmology) #Inflaton #Mathematics #Perturbation (astronomy) #Physics #Planck #Planck mass #Quantum electrodynamics #Quantum mechanics #Relativity and Gravitational Theory #Scalar (mathematics) #Scalar curvature #Scalar field #Theoretical physics #astro-ph.CO #hep-th

paper · pdf · doi:10.1103/physrevd.91.123503

published as Phys. Rev. D 91, 123503 (2015) · 13 pages, 5 figs; v2: version to appear in PRD

arxiv created 2015/05/20 · openalex publication_date 2015/06/03 · arxiv updated 2015/06/10 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05

Abstract

We consider a model of the early Universe which consists of two scalar fields: the inflaton and a second field which drives the stabilization of the Planck mass (or gravitational constant). We show that the nonminimal coupling of this second field to the Ricci scalar sources a nonadiabatic pressure perturbation. By performing a fully numerical calculation, we find, in turn, that this boosts the amplitude of the primordial power spectrum after inflation.

Citations

• Calculating nonadiabatic pressure perturbations during multifield inflation
• A Joint Analysis of BICEP2/Keck Array and Planck Data
• Inflation dynamics and reheating
• Generating the curvature perturbation without an inflaton
• New approach to the evolution of cosmological perturbations on large scales
• Primordial density perturbation in the curvaton scenario
• The Standard Model Higgs boson as the inflaton
• Quantum field theory in de Sitter space: renormalization by point-splitting
• The Confrontation between General Relativity and Experiment