2006/12/31 by Yuki Watanabe, Eiichiro Komatsu · 2 citations
Physics and Astronomy · #Axion #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Coupling (piping) #Dark matter #Galaxies: Formation, Evolution, Phenomena #Inflation (cosmology) #Inflaton #Mathematical physics #Particle physics #Physics #Quantum mechanics #Theoretical physics #Universe #astro-ph #gr-qc #hep-ph #hep-th
paper · pdf · doi:10.1103/physrevd.75.061301
published as Phys.Rev.D75:061301,2007 · 4 pages, (v2) references added, (v3) revised to have inflaton quanta canonically normalized
openalex publication_date 2007/03/07 · arxiv created 2008/04/16 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
We show that reheating of the universe occurs spontaneously in a broad class of inflation models with f(\ensuremathφ)R gravity (\ensuremathφ is the inflaton). The model does not require explicit couplings between \ensuremathφ and bosonic or fermionic matter fields. The couplings arise spontaneously when \ensuremathφ settles in the vacuum expectation value (vev) and oscillates, with coupling constants given by derivatives of f(\ensuremathφ) at the vev and the mass of resulting bosonic or fermionic fields. This mechanism allows inflaton quanta to decay into any fields which are not conformally invariant in f(\ensuremathφ)R gravity theories.