4 papers
Tunnelling out of Starobinsky inflation: Raising the spectral tilt
Jose A. R. Cembranos, Jesús Luque, Javier Rubio
We propose a hybrid realization of Starobinsky inflation in which the inflationary epoch ends through vacuum decay. The model consists of an effective two-field system with a metas…
Formation and Decay of Oscillons in Einstein-Cartan Higgs Inflation
Javier Rubio
We review recent progress in the understanding of the preheating stage of Higgs inflation formulated within the Einstein-Cartan framework of gravity. This setup smoothly interpolat…
Two or three things particle physicists (mis)understand about (pre)heating
Basabendu Barman, Nicolás Bernal, Javier Rubio
The transition from the end of inflation to a hot, thermal Universe, commonly referred to as (re)heating, is a critical yet often misunderstood phase in early Universe cosmology. T…
Scalar Dark Matter Production through the Bubble Expansion Mechanism:The Role of the Lorentz factor and Non-Renormalizable Interactions
Jose A. R. Cembranos, Jesús Luque, Javier Rubio
We consider a Bubble Expansion mechanism for the production of scalar dark matter during a first-order phase transition in the very early Universe. Seeking for a dark matter energy…