Cosmic inflation from broken conformal symmetry

Abstract

A period of rapidly accelerating expansion is expected in the early Universe implemented by a scalar field slowly rolling down along an asymptotically flat potential preferred by the current data. In this paper, we point out that this picture of the cosmic inflation with an asymptotically flat potential could emerge from the Palatini quadratic gravity by adding the matter field in such a way to break the local gauged conformal symmetry in both kinetic and potential terms.

v1, 11 pages; v2, references added, improved presentation and extended discussion; v3, major revision, version accepted for publication in Commun.Theor.Phys

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Cited by in corpus (7)

• Palatini formulation of the conformally invariant $f\left(R,L_m\right)$ gravity theory
• Primordial black holes and induced gravitational waves from double-pole inflation
• Dark Matter Production in Weyl $R^2$ Inflation
• Inflation in Weyl Scaling Invariant Gravity with $R^3$ Extensions
• Gravitational Waves from Preheating in Inflation with Weyl Symmetry
• Harrison-Zeldovich attractor: From Planck to ACT results
• Inflation in light of ACT/SPT: A new perspective from Weyl gravity