The euclidean path integral remains, in spite of its familiar problems, an important approach
to quantum gravity. One of its most striking and obscure features is the appearance of …

This is a review of exceptional field theory: a generalisation of Kaluza–Klein theory that
unifies the metric and p-form gauge field degrees of freedom of supergravity into a …

A bstract We observe a direct relation between the existence of fundamental axionic strings,
dubbed EFT strings, and infinite distance limits in 4d\(\mathcal {N}\)= 1 EFTs coupled to …

We construct compact examples of D-manifolds for type IIB strings. The construction has a
natural interpretation in terms of compactification of a 12-dimensionalF-theory'. We provide …

We construct a few euclidean supergravity solutions with multiple boundaries. We consider
examples where the corresponding boundary field theory is well defined on each boundary …

Scattering of fundamental states of type IIB supergravity and superstring theory is discussed
at low orders in perturbation theory in the background of a D-instanton. The integration over …

A bstract We discuss quantum gravitational effects in Einstein theory coupled to periodic
axion scalars to analyze the viability of several proposals to achieve superplanckian axion …

T-Duality on a timelike circle does not interchange IIA and IIB string theories, but takes the
IIA theory to a type IIB∗ theory and the IIB theory to a type IIA∗ theory. The type II∗ theories …

The 2-brane and 4-brane solutions of ten dimensional IIA supergravity have a dual
interpretation as Dirichlet-branes, or 'D-branes'. of type IIA superstring theory and as 'M …

Axion-like particles (ALPs) can form a network of cosmic strings and domain walls that
survives after recombination and leads to anisotropic birefringence of the cosmic microwave …