Nonperturbative Dynamics Of Reheating After Inflation: A Review

  title={Nonperturbative Dynamics Of Reheating After Inflation: A Review},
  author={Mustafa A. Amin and Mark P. Hertzberg and David I. Kaiser and Johanna Karouby},
  journal={International Journal of Modern Physics},
Our understanding of the state of the universe between the end of inflation and big bang nucleosynthesis (BBN) is incomplete. The dynamics at the end of inflation are rich and a potential source of observational signatures. Reheating, the energy transfer between the inflaton and Standard Model fields (possibly through intermediaries) and their subsequent thermalization, can provide clues to how inflation fits in with known high-energy physics. We provide an overview of our current understanding… 

Figures from this paper

Preheating in full general relativity
We investigate the importance of local gravity during preheating, the non-linear dynamics that may be responsible for starting the process of reheating the universe after inflation. We introduce
Reheating constraints on Kähler moduli inflation
The end of inflation is connected to the standard cosmological scenario through reheating. During reheating, the inflaton oscillates around the minimum of the potential and thus decays into the
Reheating predictions in gravity theories with derivative coupling
We investigate the inflationary predictions of a simple Horndeski theory where the inflaton scalar field has a non-minimal derivative coupling (NMDC) to the Einstein tensor. The NMDC is very
Nonlinear Dynamics of Preheating after Multifield Inflation with Nonminimal Couplings.
The strong single-field attractor behavior that was previously identified persists until the end of preheating, thereby suppressing typical signatures of multifield models and it is found that predictions for primordial observables in this class of models retain a close match to the latest observations.
Reheating predictions in single field inflation
Reheating is a transition era after the end of inflation, during which the inflaton is converted into the particles that populate the Universe at later times. No direct cosmological observables are
Gauge-preheating and the end of axion inflation
We study the onset of the reheating epoch at the end of axion-driven inflation where the axion is coupled to an Abelian, U(1), gauge field via a Chern-Simons interaction term. We focus primarily on
Production of gravitational waves during preheating with nonminimal coupling
We study the preheating and the in-process production of gravitational waves (GWs) after inflation in which the inflaton is nonminimally coupled to the curvature in a self-interacting quartic
CMB constraints on the inflaton couplings and reheating temperature in α-attractor inflation
A bstractWe study reheating in α-attractor models of inflation in which the inflaton couples to other scalars or fermions. We show that the parameter space contains viable regions in which the
Lighting the Dark: Evolution of the Postinflationary Universe.
This is the first exploration of this phase of nonlinear dynamics in the very early Universe, which can affect the detailed form of the inflationary power spectrum and the dark matter fraction when the dark sector is directly coupled to the inflaton.


Non-equilibrium electroweak baryogenesis from preheating after inflation
We present a novel scenario for baryogenesis in a hybrid inflation model at the electroweak scale, in which the standard model Higgs field triggers the end of inflation. One of the conditions for
Dynamics of tachyonic preheating after hybrid inflation
We study the instability of a scalar field at the end of hybrid inflation, using both analytical techniques and numerical simulations. We improve previous studies by taking the inflaton field fully
Probing the reheating temperature of the universe with a gravitational wave background
The thermal history of the universe after big bang nucleosynthesis (BBN) is well understood both theoretically and observationally, and recent cosmological observations also begin to reveal the
Inflation dynamics and reheating
The theory of inflation with single and multiple fields is reviewed paying particular attention to the dynamics of adiabatic and entropy/isocurvature perturbations which provide the primary means of
Reheating in Inflationary Cosmology: Theory and Applications
Reheating is an important part of inflationary cosmology. It describes the production of Standard Model particles after the phase of accelerated expansion. We review the reheating process with a
Delayed Reheating and the Breakdown of Coherent Oscillations
We analyze the evolution of the perturbations in the inflaton field and metric following the end of inflation. We present accurate analytic approximations for the perturbations, showing that the
Towards the theory of reheating after inflation
Reheating after inflation occurs due to particle production by the oscillating inflaton field. In this paper we describe the perturbative approach to reheating, and then concentrate on effects beyond
Transition to order after hilltop inflation
We investigate the rich nonlinear dynamics during the end of hilltop inflation by numerically solving the coupled Klein-Gordon-Friedmann equations in a expanding universe. In particular, we search
Erice Lectures on Inflationary Reheating
At the end of the inflationary stage of the early universe, profuse particle production leads to the reheating of the universe. Such explosive particle production is due to parametric amplification
Generation of gravitational waves during early structure formation between cosmic inflation and reheating
In the pre-reheating era, following cosmic inflation and preceding radiation domination, the energy density may be dominated by an oscillating massive scalar condensate, such as is the case for V =