Gauss-Bonnet-coupled Quintessential Inflation

Abstract

We study in detail a new model of quintessential inflation where the inflaton field is coupled to the Gauss-Bonnet term. This coupling ensures that the variation of the field is kept sub-Planckian, which avoids the 5th force problem as well as the lifting of the flatness of the quintessential tail in the runaway scalar potential due to radiative corrections. We find that the inflationary predictions of the model are in excellent agreement with CMB observations, while the coincidence requirement of dark energy is satisfied with natural values of the parameters, overcoming thereby the extreme fine-tuning of the cosmological constant in $\Lambda$CDM.

arXiv comment26 pages, 1 figure

Cited by in corpus (16)

• Swampland Implications of GW170817-compatible Einstein-Gauss-Bonnet Gravity
• Inflationary Phenomenology of Einstein Gauss-Bonnet Gravity Compatible with GW170817
• Primordial Gravitational Waves Predictions for GW170817-compatible Einstein-Gauss-Bonnet Theory
• Quintessential inflation in Palatini $f(R)$ gravity
• Reconstruction of GR cosmological solutions in modified gravity theories
• Late-Time Cosmology of Scalar-Coupled $f(R,\mathcal{G})$ Gravity
• Bottom-Up Reconstruction of Viable GW170817 Compatible Einstein-Gauss-Bonnet Theories
• Quintessential inflation and cosmological seesaw Mechanism: reheating and observational constraints
• Gauss-Bonnet Dark Energy and the Speed of Gravitational Waves
• Quintessence in the Weyl-Gauss-Bonnet model
• $k$-Inflation-corrected Einstein-Gauss-Bonnet Gravity with Massless Primordial Gravitons
• Testing $\alpha$-attractor quintessential inflation against CMB and low-redshift data
• Ultraviolet Sensitivity in Higgs-Starobinsky Inflation
• More accurate slow-roll approximations for inflation in scalar-tensor theories
• Generalized Horndeski-Like Einstein Gauss-Bonnet Inflation with Massless Primordial Gravitons
• Quintessence in Multi-Measure Generalized Gravity Stabilized by Gauss-Bonnet/Inflaton Coupling