Gravitational waves are a unique probe of the early Universe, as the Universe is transparent
to gravitational radiation right back to the end of inflation. This review summarizes detection …

We study the nonperturbative evolution of inflationary fluctuations during preheating using
fully nonlinear general-relativistic field-theory simulations. We choose a single-field …

Particle decays are always accompanied by the emission of graviton quanta of gravity
through bremsstrahlung processes. However, the corresponding branching ratio is …

We investigate the production of gravitational waves (GWs) during preheating with
monomial/polynomial inflationary potentials, considering a trilinear coupling ϕχ 2 between a …

We discuss the present state and planned updates of CosmoLattice, a cutting-edge code for
lattice simulations of non-linear dynamics of scalar-gauge field theories in an expanding …

A spectator axion-gauge sector, minimally coupled to the inflaton, with the axion
experiencing a momentary stage of fast roll during cosmological inflation, can generate …

A bstract Weyl fermions of spin\(\frac {1}{2}\) minimally coupled to Einstein's gravity in 4
dimensions cannot be produced purely gravitationally in an expanding Universe at tree …

One of the key predictions of the standard inflationary paradigm is the quantum mechanical
generation of the transverse and traceless tensor fluctuations due to the rapid accelerated …

The minimal coupling of massless fermions to gravity does not allow for their gravitational
production solely based on the expansion of the Universe. We argue that this changes in …

We characterize the post-inflationary dynamics of an inflaton ϕ coupled to multiple
interacting daughter fields X n (n= 1,... N d) through quadratic-quadratic interactions gn 2 ϕ 2 …