192 citations · 2.3k across the 49 of their papers we have counts for
26 papers · 1 filter
Stochastic Gravitational Waves from Modulated Reheating
Michele Benaco, Dimitrios Karamitros, Sami Nurmi +1
We investigate scalar-induced stochastic gravitational waves from adiabatic curvature perturbations sourced by a spectator field via the modulated reheating mechanism. We consider…
Primordial black holes from a curvaton scenario with strongly non-Gaussian perturbations
Andrew D. Gow, Tays Miranda, Sami Nurmi
We investigate the production of primordial black holes (PBHs) in a mixed inflaton-curvaton scenario with a quadratic curvaton potential, assuming the curvaton is in de Sitter equi…
Critical point Higgs inflation in the Palatini formulation
Vera-Maria Enckell, Sami Nurmi, Syksy Rasanen +1
We study Higgs inflation in the Palatini formulation with the renormalisation group improved potential in the case when loop corrections generate a feature similar to an inflection…
Primordial dark matter from curvature induced symmetry breaking
Laura Laulumaa, Tommi Markkanen, Sami Nurmi
We demonstrate that adiabatic dark matter can be generated by gravity induced symmetry breaking during inflation. We study a symmetric scalar singlet that couples to other fi…
Despicable Dark Relics: generated by gravity with unconstrained masses
Malcolm Fairbairn, Kimmo Kainulainen, Tommi Markkanen +1
We demonstrate the existence of a generic, efficient and purely gravitational channel producing a significant abundance of dark relics during reheating after the end of inflation.…
CMB spectral distortions in generic two-field models
Kimmo Kainulainen, Juuso Leskinen, Sami Nurmi +1
We investigate the CMB distortion in models where two uncorrelated sources contribute to primordial perturbations. We parameterise each source by an amplitude, tilt, running an…