A bstract We reformulate in Hamiltonian language the recent proposal by Hohm and
Zwiebach of an action yielding the most general O (d, d)-symmetric string cosmology …

Starting with the two-derivative limit of D= 2 string theory, we explore the space of T-duality
invariant α′ corrections, a space that contains a point representing the fully α′-corrected …

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 …

We first make more precise a recent" Hamiltonian" reformulation of the Hohm-Zwiebach
approach to the tree-level, O (d, d)-invariant string cosmology equations at all orders in the …

This paper serves as an extended version of our previous letter arXiv: 2212.03808 [hep-th].
In this paper, we investigate the non-perturbative and non-singular black hole solutions …

In this paper, we present two non-perturbative string cosmological solutions without
curvature singularities for the bosonic gravi-dilaton system. These solutions are general in …

A bstract In this paper, we generalize the correspondence between large D gravity and low
D string theory to the most general case, including its T-dual solutions. It is well-known that …

Focusing on a string-hole gas within the pre-big bang scenario, we study the stability of its
solutions in the phase space. We firstly extend the analysis present in the literature relaxing …

The resolution of black hole singularities represents an essential problem in the realm of
quantum gravity. Due to the Belinskii, Khalatnikov and Lifshitz (BKL) proposal, the structure …

In this paper, we obtain the three-dimensional regular extremal black string solution
incorporating $\alpha'$ corrections and a non-trivial Kalb-Ramond field. The difficulty in …