200 citations · 2.2k across the 48 of their papers we have counts for
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Tensor Spectra Templates for Axion-Gauge Fields Dynamics during Inflation
Tomohiro Fujita, Evangelos I. Sfakianakis, Maresuke Shiraishi
gauge fields can generate large gravitational waves during inflation, if they are coupled to an axion which can be either the inflaton or a spectator field. The shape of th…
Universality and scaling in multi-field -attractor preheating
Oksana Iarygina, Evangelos I. Sfakianakis, Dong-Gang Wang +1
We explore preheating in multi-field models of inflation in which the field-space metric is a highly curved hyperbolic manifold. One broad family of such models is called -attra…
Preheating after Higgs Inflation: Self-Resonance and Gauge boson production
Evangelos I. Sfakianakis, Jorinde van de Vis
We perform an extensive analysis of linear fluctuations during preheating in Higgs inflation in the Einstein frame, where the fields are minimally coupled to gravity, but the field…
Angular inflation in multi-field -attractors
Perseas Christodoulidis, Diederik Roest, Evangelos I. Sfakianakis
We explore the dynamics of multi-field models of inflation in which the field-space metric is a hyperbolic manifold of constant curvature. Such models are known as -attractors a…