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 …

In this review, we investigate the question of backreaction in different approaches to
cosmological perturbation theory, and with a special focus on quantum theoretical aspects …

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

The microscopic quantum field theory origins of warm inflation dynamics are reviewed. The
warm inflation scenario is first described along with its results, predictions and comparison …

We consider a simple inflationary model with a peculiarity in the form of a “plateau” in the
inflaton potential. We use the formalism of a coarse-grained field in order to describe the …

In generic particle physics models, the inflaton field is coupled to other bosonic and
fermionic fields that acquire large masses during inflation and may decay into light degrees …

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

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 …

We show how the quantum-to-classical transition of the cosmological fluctuations produced
during inflation can be described by means of the influence functional and the master …

Trans-Planckian redshifts in cosmology and outside black holes may provide windows on a
hypothetical short distance cutoff on the fundamental degrees of freedom. In cosmology …