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Dark Energy after GW170817: dead ends and the road ahead
Jose María Ezquiaga, Miguel Zumalacárregui
Multi-messenger gravitational wave (GW) astronomy has commenced with the detection of the binary neutron star merger GW170817 and its associated electromagnetic counterparts. The a…
Primordial Black Hole production in Critical Higgs Inflation
Jose Maria Ezquiaga, Juan Garcia-Bellido, Ester Ruiz Morales
Primordial Black Holes (PBH) arise naturally from high peaks in the curvature power spectrum of near-inflection-point single-field inflation, and could constitute today the dominan…
Field redefinitions in theories beyond Einstein gravity using the language of differential forms
Jose María Ezquiaga, Juan García-Bellido, Miguel Zumalacárregui
We study the role of field redefinitions in general scalar-tensor theories. In particular, we first focus on the class of field redefinitions linear in the spin-2 field and involvi…