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 …

One of the most promising ways to probe intergalactic magnetic fields (IGMFs) is through
gamma rays produced in electromagnetic cascades initiated by high-energy gamma rays or …

Parity-violating physics in the early universe can leave detectable traces in late-time
observables. While vector-and tensor-type parity violation can be observed in the B-modes …

A stochastic gravitational wave background is a prediction of a number of astrophysical and
cosmological phenomena including early Universe cosmology. Recently, the NANOGrav …

We study the explosive production of gauge fields during axion inflation in a novel gradient
expansion formalism that describes the time evolution of a set of bilinear electromagnetic …

We study gravitational wave production from gauge preheating in a variety of inflationary
models, detailing its dependence on both the energy scale and the shape of the potential …

We consider a mechanism for producing a significant population of primordial black holes
(PBHs) and an observable stochastic gravitational wave background (SGWB) within string …

We consider a model in which a pseudo-scalar field σ rolls for some e-folds during inflation,
sourcing one helicity of a gauge field. These fields are only gravitationally coupled to the …

Axion inflation, ie an axion-like inflaton coupled to an Abelian gauge field through a Chern-
Simons interaction, comes with a rich and testable phenomenology. This is particularly true …

A bstract Particle production in strong electromagnetic fields is a recurring theme in solid
state physics, heavy ion collisions, early universe cosmology and formal quantum field …