The universe is magnetized on all scales probed so far. On the largest scales, galaxies and
galaxy clusters host magnetic fields at the micro Gauss level coherent on scales up to ten …

In order to unravel the present situation of the PBH overproduction problem, our study
emphasizes the critical role played by the equation of state (EoS) parameter w within the …

The goal of this contribution is to present the properties of a class of quantum bouncing
models in which the quantum bounce originates from the Dirac canonical quantization of a …

We study the generation of helical magnetic fields in a model of inflationary magnetogenesis
which is free from the strong coupling and backreaction problems. To generate helical …

The non-singular bouncing cosmology is an alternative paradigm to inflation, wherein the
background energy density vanishes at the bounce point, in the context of Einstein gravity …

Recent blazar observations provide growing evidence for the presence of magnetic fields in
the extragalactic regions. While natural speculation is to associate the production with …

Generation of magnetic fields during inflation is a promising mechanism for the origin of the
observed large scale magnetic fields in the universe. Among several attempts, a popular …

Bouncing scenarios offer an alternative to the inflationary paradigm for the generation of
perturbations in the early universe. Recently, there has been a surge in interest in examining …

We investigate primordial magnetogenesis and the evolution of the electromagnetic field
through a quantum bounce P. Peter, EJ Pinho, and N. Pinto-Neto, Phys. Rev. D 75, 023516 …

Matter bounces refer to scenarios wherein the universe contracts at early times as in a
matter dominated epoch until the scale factor reaches a minimum, after which it starts …