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View article: Dynamics of Cosmic Superstrings and the Overshoot Problem
Dynamics of Cosmic Superstrings and the Overshoot Problem Open
We exploit the techniques of dynamical systems to study the cosmological evolution of cosmic fundamental strings and effective strings arising from branes wrapped on internal cycles. We also include the whole potential of the volume modulu…
View article: Deep observations of the Type IIB flux landscape
Deep observations of the Type IIB flux landscape Open
A bstract We present deep observations in targeted regions of the string landscape through a combination of analytic and dedicated numerical methods. Specifically, we devise an algorithm designed for the systematic construction of Type IIB…
View article: Growth of cosmic strings beyond kination
Growth of cosmic strings beyond kination Open
A novel mechanism for the production of a cosmic network of fundamental superstrings based on a time-varying string tension has been recently proposed in the context of a kinating background driven by the volume modulus of string compactif…
View article: Chiral global embedding of Fibre Inflation with $$ \overline{\textrm{D}3} $$ uplift
Chiral global embedding of Fibre Inflation with $$ \overline{\textrm{D}3} $$ uplift Open
A bstract We carefully analyse the challenges posed by the construction of type IIB chiral global embeddings of Fibre Inflation with $$ \overline{\textrm{D}3} $$ uplift to a de Sitter vacuum. We present an explicit example involving …
View article: Exploring the Dark Universe: A European Strategy for Axions and other WISPs Discovery
Exploring the Dark Universe: A European Strategy for Axions and other WISPs Discovery Open
Axions and other very weakly interacting slim (with $m <$ 1 GeV) particles (WISPs) are a common feature of several extensions of the Standard Model of Particle Physics. The search of WISPs was already recommended in the last update of the …
View article: Back to the origins of brane–antibrane inflation
Back to the origins of brane–antibrane inflation Open
We study a new framework for brane–antibrane inflation where moduli stabilisation relies purely on perturbative corrections to the effective action. This guarantees that the model does not suffer from the eta-problem. The inflationary pote…
View article: Deep observations of the Type IIB flux landscape
Deep observations of the Type IIB flux landscape Open
We present deep observations in targeted regions of the string landscape through a combination of analytic and dedicated numerical methods. Specifically, we devise an algorithm designed for the systematic construction of Type IIB flux vacu…
View article: Chiral global embedding of Fibre Inflation with $\overline{\rm D3}$ uplift
Chiral global embedding of Fibre Inflation with $\overline{\rm D3}$ uplift Open
We carefully analyse the challenges posed by the construction of type IIB chiral global embeddings of Fibre Inflation with $\overline{ \rm D3}$ uplift to a de Sitter vacuum. We present an explicit example involving an $h^{1,1}=4$ Calabi-Ya…
View article: From inflation to quintessence: a history of the universe in string theory
From inflation to quintessence: a history of the universe in string theory Open
View article: Back to the origins of brane-antibrane inflation
Back to the origins of brane-antibrane inflation Open
We study a new framework for brane-antibrane inflation where moduli stabilisation relies purely on perturbative corrections to the effective action. This guarantees that the model does not suffer from the eta-problem. The inflationary pote…
View article: Loop blow-up inflation
Loop blow-up inflation Open
View article: From Inflation to Quintessence: a History of the Universe in String Theory
From Inflation to Quintessence: a History of the Universe in String Theory Open
We present a type IIB 4D string model with stabilised moduli which is able to describe the history of the universe from inflation to quintessence. The underlying Calabi-Yau volume is controlled by two moduli which are stabilised by perturb…
View article: Loop Blow-up Inflation
Loop Blow-up Inflation Open
We present a new model of string inflation driven by a blow-up Kähler modulus of type IIb compactifications with a potential generated by string loops. Slow-roll is naturally realized thanks to the fact that the blow-up mode is a leading-o…
View article: Phenomenology of superheavy decaying dark matter from string theory
Phenomenology of superheavy decaying dark matter from string theory Open
View article: Higher derivative corrections to string inflation
Higher derivative corrections to string inflation Open
A bstract We quantitatively estimate the leading higher derivative corrections to $$ \mathcal{N} $$ = 1 supergravity derived from IIB string compactifications and study how they may affect moduli stabilisation and LVS inflation models. U…
View article: String cosmology: From the early universe to today
String cosmology: From the early universe to today Open
We review applications of string theory to cosmology, from primordial times to the present-day accelerated expansion. Starting with a brief overview of cosmology and string compactifications, we discuss in detail moduli stabilisation, infl…
View article: Sequestered string models imply split supersymmetry
Sequestered string models imply split supersymmetry Open
A bstract Sequestering is a promising mechanism in 4D string models to reconcile high-scale inflation with low-energy supersymmetry. In this scenario the MSSM lives on branes at singularities and it is sequestered from the sources of super…
View article: Phenomenology of superheavy decaying dark matter from string theory
Phenomenology of superheavy decaying dark matter from string theory Open
We study the phenomenology of superheavy decaying dark matter with mass around $10^{10}$ GeV which can arise in the low-energy limit of string compactifications. Generic features of string theory setups (such as high scale supersymmetry br…
View article: Higher Derivative Corrections to String Inflation
Higher Derivative Corrections to String Inflation Open
We quantitatively estimate the leading higher derivative corrections to ${\mathcal{N}}=1$ supergravity derived from IIB string compactifications and study how they may affect moduli stabilisation and LVS inflation models. Using the Kreuzer…
View article: Sequestered String Models imply Split Supersymmetry
Sequestered String Models imply Split Supersymmetry Open
Sequestering is a promising mechanism in 4D string models to reconcile high-scale inflation with low-energy supersymmetry. In this scenario the MSSM lives on branes at singularities and it is sequestered from the sources of supersymmetry b…
View article: Starobinsky inflation from string theory?
Starobinsky inflation from string theory? Open
View article: Early Dark Energy in Type IIB String Theory
Early Dark Energy in Type IIB String Theory Open
A bstract Early Dark Energy (EDE) is a promising model to resolve the Hubble Tension, that, informed by Cosmic Microwave Background data, features a generalization of the potential energy usually associated with axion-like particles. We de…
View article: Starobinsky Inflation from String Theory?
Starobinsky Inflation from String Theory? Open
Starobinsky inflation is currently one of the best models concerning agreement with cosmological data. Despite this observational success, it is still lacking a robust embedding into a UV complete theory. Previous efforts to derive Starobi…
View article: Moduli stabilisation and the statistics of axion physics in the landscape
Moduli stabilisation and the statistics of axion physics in the landscape Open
String theory realisations of the QCD axion are often said to belong to the anthropic window where the decay constant is around the GUT scale and the initial misalignment angle has to be tuned close to zero. In this paper we revisit this s…
View article: String Cosmology: from the Early Universe to Today
String Cosmology: from the Early Universe to Today Open
We review applications of string theory to cosmology, from primordial times to the present-day accelerated expansion. Starting with a brief overview of cosmology and string compactifications, we discuss in detail moduli stabilisation, infl…
View article: Early Dark Energy in Type IIB String Theory
Early Dark Energy in Type IIB String Theory Open
Early Dark Energy (EDE) is a promising model to resolve the Hubble Tension, that, informed by Cosmic Microwave Background data, features a generalization of the potential energy usually associated with axion-like particles. We develop real…
View article: Cosmology intertwined: A review of the particle physics, astrophysics, and cosmology associated with the cosmological tensions and anomalies
Cosmology intertwined: A review of the particle physics, astrophysics, and cosmology associated with the cosmological tensions and anomalies Open
View article: Joint statistics of cosmological constant and SUSY breaking in flux vacua with nilpotent Goldstino
Joint statistics of cosmological constant and SUSY breaking in flux vacua with nilpotent Goldstino Open
View article: On the choice of entropy variables in multifield inflation
On the choice of entropy variables in multifield inflation Open
We discuss the usefulness and theoretical consistency of different entropy variables used in the literature to describe isocurvature perturbations in multifield inflationary models with a generic curved field space. We clarify which is the…
View article: The dark universe after reheating in string inflation
The dark universe after reheating in string inflation Open