99 citations · 1.7k across the 115 of their papers we have counts for
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Dynamics of Gauge Field Inflation
Stephon Alexander, Dhrubo Jyoti, Arthur Kosowsky +1
We analyze the existence and stability of dynamical attractor solutions for cosmological inflation driven by the coupling between fermions and a gauge field. Assuming a spatially h…
Fermi-bounce cosmology and the fermion curvaton mechanism
Stephon Alexander, Yi-Fu Cai, Antonino Marciano
A nonsingular bouncing cosmology can be achieved by introducing a fermion field with BCS condensation occurring at high energy scales. In this paper we are able to dilute the aniso…
Gravitational-Wave Mediated Preheating
Stephon Alexander, Sam Cormack, Antonino Marcianò +1
We propose a new preheating mechanism through the coupling of the gravitational field to both the inflaton and matter fields, without direct inflaton-matter couplings. The inflaton…
Fermi-bounce Cosmology and scale invariant power-spectrum
Stephon Alexander, Cosimo Bambi, Antonino Marciano +1
We develop a non-singular bouncing cosmology using a non-trivial coupling of general relativity to fermionic fields. The usual Big Bang singularity is avoided thanks to a negative…
Singularity avoidance in classical gravity from four-fermion interaction
Cosimo Bambi, Daniele Malafarina, Antonino Marciano +1
We derive the dynamics of the gravitational collapse of a homogeneous and spherically symmetric cloud in a classical set-up endowed with a topological sector of gravity and a non-m…