513 citations · 5.8k across the 103 of their papers we have counts for
6 papers · 1 filter
Reheating and Dark Radiation after Fibre Inflation
Michele Cicoli, Gabriel A. Piovano
We study perturbative reheating at the end of fibre inflation where the inflaton is a closed string modulus with a Starobinsky-like potential. We first derive the spectral index $n…
De Sitter vs Quintessence in String Theory
Michele Cicoli, Senarath de Alwis, Anshuman Maharana +2
De Sitter solutions have been recently conjectured to be incompatible with quantum gravity. In this paper we critically assess the progress and challenges of different mechanisms t…
A geometrical instability for ultra-light fields during inflation?
Michele Cicoli, Veronica Guidetti, Francisco G. Pedro +1
Westudythebehaviourofisocurvatureperturbationsinnon-linearsigmamodels which naturally emerge in supergravity and string inflationary scenarios. We focus on the case of negatively c…
Primordial Black Holes from String Inflation
Michele Cicoli, Victor A. Diaz, Francisco G. Pedro
We present a single-field string inflationary model which allows for the generation of primordial black holes in the low mass region where they can account for a significant fracti…
Extended Effective Field Theory of Inflation
Amjad Ashoorioon, Roberto Casadio, Michele Cicoli +2
We present a general framework where the effective field theory of single field inflation is extended by the inclusion of operators with mass dimension 3 and 4 in the unitary gauge…
A Geometrical Upper Bound on the Inflaton Range
Michele Cicoli, David Ciupke, Christoph Mayrhofer +1
We argue that in type IIB LVS string models, after including the leading order moduli stabilisation effects, the moduli space for the remaining flat directions is compact due the C…