From the 2 of 16 linked papers with an AI index.
16 papers
Spectator Axions in String Inflation and Primordial Black Holes
Michele Cicoli, Dario L. Lorenzoni, Evan McDonough +1
The paper examines how light spectator axions during Fibre Inflation in string theory influence the generation of primordial black holes, showing that axions with moderately large…
Gravitational Waves from Multiple Cosmic Superstrings and the Overshoot Problem
Luca Brunelli, Michele Cicoli, Muhammad Hassan +2
The paper analyzes how multiple species of cosmic superstrings in post‑inflationary string cosmology avoid the overshoot problem via friction from a gravitational‑wave radiation ba…
Flux Vacua Near the Boundary of Large Complex Structure
Aman Chauhan, Michele Cicoli, Anshuman Maharana +1
Three-form fluxes generate a potential for the complex structure moduli in type IIB string compactifications on Calabi-Yau threefolds. In the large complex structure patch, the pot…
New Type IIB Poly-instanton Effects and Axion Quintessence
Luca Caraffi, Federico Carta, Michele Cicoli
Previous studies of poly-instantons in type IIB Calabi-Yau orientifolds found that these effects arise when Euclidean D3-branes wrap rigid cycles with a Wilson line. In this work,…
Moduli Stabilisation for ADD and the Dark Dimension Scenario
Andreas P. Braun, Michele Cicoli, Riccardo Milioli +1
We provide a moduli stabilisation mechanism for realising anisotropic string compactifications with one or two large extra dimensions, corresponding to the ADD and Dark Dimension s…
Recent progress on inflation and dark energy from string theory
Michele Cicoli
We review recent progress in string model building in both early and late time cosmology. We describe the main theoretical and phenomenological features of an entire class of infla…