200 citations · 2.2k across the 48 of their papers we have counts for
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Gravitational wave spectra from oscillon formation after inflation
Takashi Hiramatsu, Evangelos I. Sfakianakis, Masahide Yamaguchi
We systematically investigate the preheating behavior of single field inflation with an oscillon-supporting potential. We compute the properties of the emitted gravitational waves…
Primordial non-Gaussianity from the Effects of the Standard Model Higgs during Reheating after Inflation
Aliki Litsa, Katherine Freese, Evangelos I. Sfakianakis +2
We propose a new way of studying the Higgs potential at extremely high energies. The Standard Model (SM) Higgs boson, as a light spectator field during inflation in the early Unive…
Symmetric multifield oscillons
Fabio van Dissel, Evangelos I. Sfakianakis
Oscillons are long-lived, spatially localized field configurations, which are supported by attractive non-linearities in the scalar potential. We study oscillons comprised of multi…
Large Density Perturbations from Reheating to Standard Model particles due to the Dynamics of the Higgs Boson during Inflation
Aliki Litsa, Katherine Freese, Evangelos I. Sfakianakis +2
Cosmic Microwave Background (CMB) observations are used to constrain reheating to Standard Model (SM) particles after a period of inflation. As a light spectator field, the SM Higg…
Multi-field inflation and preheating in asymmetric -attractors
Oksana Iarygina, Evangelos I. Sfakianakis, Dong-Gang Wang +1
We analyze and compare the multi-field dynamics during inflation and preheating in symmetric and asymmetric models of -attractors, characterized by a hyperbolic field-space mani…
Time-Scales for Nonlinear Processes in Preheating after Multifield Inflation with Nonminimal Couplings
Jorinde van de Vis, Rachel Nguyen, Evangelos I. Sfakianakis +2
We have conducted extensive lattice simulations to study the post-inflation dynamics of multifield models involving nonminimal couplings. We explore the parameter dependence of pre…