Reheating via Gravitational Particle Production in Simple Models of Quintessence or ΛCDM Inflation

Abstract

Abstract:We have tested some simple ΛCDM (the same test is also valid for quintessence) inflation models, imposing that they match with the recent observational data provided by the BICEP and Planck's team and leading to a reheating temperature, which is obtained via gravitational particle production after inflation, supporting the nucleosynthesis success.

Ability of LIGO and LISA to probe the equation of state of the early Universe

“…A stiff epoch is a crucial aspect in various early Universe scenarios, for instance the Quintessential inflation [25][26][27][28][29][30][31][32][33], where inflation is followed by an epoch dominated by the kinetic energy of the inflaton, with the potential adjusted to describe the observed dark energy today. Various mechanisms for excitation of the radiation component that eventually will dominate the energy budget in these scenarios have been proposed and worked out in detail [52][53][54][55][56] such that the duration of the SD phase is controlled by the relevant parameters involved in each construction. One of such mechanisms is the original gravitational reheating model [34,35], where the Universe is reheated by the decay products of inflationary spectator fields excited during or towards the end of inflation.…”