A bstract In a quantum theory of gravity, the species scale Λ s can be defined as the scale at
which corrections to the Einstein action become important or alternatively as codifying the …

A bstract We study towers of light particles that appear in infinite-distance limits of moduli
spaces of 9-dimensional\(\mathcal {N}\)= 1 string theories, some of which notably feature …

A bstract Infinite distance limits in the moduli space of a quantum gravity theory are
characterized by having infinite towers of states becoming light, as dictated by the Distance …

A bstract The scale at which quantum gravity becomes manifest, the species scale Λ s, has
recently been argued to take values parametrically lower than the Planck scale. We use …

A bstract We argue that the Starobinsky model of inflation, realised via an R 2 term in the
Lagrangian, can originate from quantum effects due to a tower of light species. By means of …

A bstract The three tachyon-free non-supersymmetric string theories in ten dimensions
provide a handle on quantum gravity away from the supersymmetric lamppost. However …

The role of the species scale as the Quantum Gravity (QG) cut-off has been recently
emphasised in the context of the Swampland Program. Along these lines, we continue the …

A bstract We explore a notion of distance between vacua of a discrete landscape that takes
into account scalar potentials and fluxes via transitions mediated by domain walls. Such …

A bstract The species scale provides a lower bound on the shortest possible length that can
be probed in gravitational effective theories. It may be defined by the size of the minimal …

A bstract We examine the minimal constraints imposed by the Weak Gravity Conjecture
(WGC) on the particle spectrum of a quantum gravity theory. Towers of super-extremal states …