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astro-ph.CO2026
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…
hep-ph2026
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…