27 citations · 49 across the 4 of their papers we have counts for
7 papers · 1 filter
Axionic Festina Lente
Veronica Guidetti, Nicole Righi, Victoria Venken +1
The swampland conjecture known as Festina Lente (FL) imposes a lower bound on the mass of all charged particles in a quasi-de Sitter space. In this paper, we propose the aFL (axion…
Fuzzy Dark Matter Candidates from String Theory
Michele Cicoli, Veronica Guidetti, Nicole Righi +1
String theory has been claimed to give rise to natural fuzzy dark matter candidates in the form of ultralight axions. In this paper we revisit this claim by a detailed study of how…
A Fake Instability in String Inflation
Michele Cicoli, Veronica Guidetti, Francesco Muia +2
In type IIB Fibre Inflation models the inflaton is a Kaehler modulus which is kinetically coupled to the corresponding axion. In this setup the curvature of the field space induces…
Geometrical Destabilisation of Ultra-Light Axions in String Inflation
Michele Cicoli, Veronica Guidetti, Francisco G. Pedro
We perform a detailed analytical and numerical analysis of the multi-field evolution of Fibre Inflation and show that, regardless of the microscopic realisation of the model, the m…
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…
Chiral Global Embedding of Fibre Inflation Models
Michele Cicoli, David Ciupke, Victor A. Diaz +3
We construct explicit examples of fibre inflation models which are globally embedded in type IIB orientifolds with chiral matter on D7-branes and full closed string moduli stabilis…