In this work, we study the effects of field space curvature on scalar field perturbations around
an arbitrary background field trajectory evolving in time. Nontrivial imprints of the “heavy” …

We study the dynamics of two-field models of inflation characterized by a hierarchy of
masses between curvature and isocurvature modes. When the hierarchy is large, a low …

We perform a general analysis on the possibility of obtaining metastable vacua with
spontaneously broken Script N= 1 supersymmetry and non-negative cosmological constant …

We study cosmological properties of type IIA compactifications on orientifolds of SU (3)-
structure manifolds with non-vanishing geometric flux. These compactifications give rise to …

Cosmological α-attractor models in N= 1 supergravity are based on the hyperbolic geometry
of a Poincaré disk with the radius square R 2= 3 α. The predictions for the B modes, r≈ 3 α 4 …

We consider string theory compactifications of the form AdS with orientifold six-planes,
where is a six-dimensional compact space that is either a nilmanifold or a coset. For all …

We perform a general algebraic analysis on the possibility of realising slow-roll inflation in
the moduli sector of string models. This problem turns out to be very closely related to the …

We discuss some implications of the recently suggested swampland conjecture|∇ V| V≳ c∼
1, together with a previous one Δ ϕ≲ 1. We list some implications for particle …

Potentials in cosmological inflation often involve scalars with trans-Planckian ranges. As a
result, towers of states become massless and their presence pushes the fundamental scale …

We construct a class of single small field models of inflation that can predict, contrary to
popular wisdom, an observable gravitational wave signal in the cosmic microwave …