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 …

De Sitter solutions have been recently conjectured to be incompatible with quantum gravity.
In this paper we critically assess the progress and challenges of different mechanisms to …

A bstract We study the vacua of 4d heterotic toroidal orbifolds using effective theories
consisting of an overall Kähler modulus, the dilaton, and non-perturbative corrections to both …

We describe two different, but equivalent semiclassical views of black hole physics in which
the equivalence principle and unitarity are both accommodated. In one, unitarity is built-in …

We perform a thorough analysis of de Sitter solutions in O (d, d) invariant cosmologies.
Starting with a homogeneous and isotropic framework we examine conditions for the …

It is shown in this article that an explicit construction of a four‐dimensional de Sitter space
may be performed using a diagrammatic approach via nodal diagrams emanating from the …

We provide further evidence to support the fact that a four‐dimensional effective field theory
description with de Sitter isometries in IIB string theory, overcoming the no‐go and the …

Quantum transitions among de Sitter and Minkowski spacetimes through bubble nucleation
are revisited using the Hamiltonian formalism. We interpret tunnelling probabilities as …

We propose a new approach for multiverse analysis based on computational complexity,
which leads to a new family of “computational” measure factors. By defining a cosmology as …

Black hole complementarity posits that the interior of a black hole is not independent from its
Hawking radiation. This leads to an apparent violation of causality: the interior can be …