152 citations · 932 across the 13 of their papers we have counts for
3 papers · 1 filter
Heavy fields, reduced speeds of sound and decoupling during inflation
Ana Achucarro, Vicente Atal, Sebastian Cespedes +3
We discuss and clarify the validity of effective single field theories of inflation obtained by integrating out heavy degrees of freedom in the regime where adiabatic perturbations…
On the importance of heavy fields during inflation
Sebastian Cespedes, Vicente Atal, Gonzalo A. Palma
We study the dynamics of two-field models of inflation characterized by a hierarchy of masses between curvature and isocurvature modes. When the hierarchy is large, a low energy ef…
Bigravitational inflation
Vicente Atal, Luis E. Campusano, Gonzalo A. Palma
We study the realization of cosmic inflation in bigravity theories. By analyzing the evolution of scalar, vector, and tensor perturbations in de Sitter-like spacetimes, we find str…