359 citations · 1.7k across the 47 of their papers we have counts for
6 papers · 1 filter
Constraining the General Oscillatory Inflaton Potential with Freeze-in Dark Matter and Gravitational Waves
Jose A. R. Cembranos, Mindaugas Karčiauskas
The reheating phase after inflation is one of the least observationally constrained epochs in the evolution of the Universe. The forthcoming gravitational wave observatories will e…
Vector dark matter production during inflation and reheating
Jose A. R. Cembranos, Luis J. Garay, Álvaro Parra-López +1
Gravitational particle production of spectator fields due to the expansion universe during the inflationary and reheating phases of the early universe is of particular interest in…
The Invisible Dilaton
Philippe Brax, Clare Burrage, Jose A. R. Cembranos +1
We analyse the dynamics of a light scalar field responsible for the term of the Higgs potential and coupled to matter via the Higgs-portal mechanism. We find that this dilaton…
Operational realization of quantum vacuum ambiguities
Álvaro Álvarez-Domínguez, José A. R. Cembranos, Luis J. Garay +3
We provide a reinterpretation of the quantum vacuum ambiguities that one encounters when studying particle creation phenomena due to an external and time-dependent agent. We propos…
Graviton-photon oscillation in a cosmic background for a general theory of gravity
José A. R. Cembranos, Miguel González Ortiz, Prado Martín-Moruno
Graviton-photon oscillation is the conversion of gravitational waves to electromagnetic waves and vice versa in the presence of a background electromagnetic field. We investigate t…
Late vacuum choice and slow roll approximation in gravitational particle production during reheating
Jose A. R. Cembranos, Luis J. Garay, Álvaro Parra-López +1
In the transition between inflation and reheating, the curvature scalar typically undergoes oscillations which have significant impact on the density of gravitationally produced pa…