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 …

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 …

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 …

Bringing together the key ideas from nonequilibrium statistical mechanics and powerful
methodology from quantum field theory, this 2008 book captures the essence of …

Cosmological perturbations can undergo amplification by parametric resonance during
preheating even on scales larger than the Hubble radius, without violating causality. A …

General relativistic effects in the form of metric perturbations are usually neglected in the
preheating era that follows inflation. We argue that in realistic multi-field models these effects …

We study the parametric amplification of super-Hubble-scale scalar metric fluctuations at the
end of inflation in some specific two-field models of inflation, a class of which is motivated by …

During the preheating era after inflation, resonant amplification of quantum field fluctuations
takes place. Recently it has become clear that this must be accompanied by resonant …

In these lectures I focus on early universe models which can explain the currently observed
structure on large scales. I begin with a survey of inflationary cosmology, the current …

In this work, our prime focus is to study the one to one correspondence between the
conduction phenomena in electrical wires with impurity and the scattering events …