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 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 report two surprising results on α′ corrections in string theory restricted to massless
fields. First, for critical dimension Bianchi type I cosmologies with q scale factors only q-1 of …

A bstract Recently, all duality invariant α′-corrections to the massless NS-NS sector of
string theory on time-dependent backgrounds were classified and the form of their …

A bstract The α′-complete cosmology developed by Hohm and Zwiebach classifies the O
(d, d; ℝ) invariant theories involving metric, b-field and dilaton that only depend on time, to …

We compute the cosmological reduction of general string theories, including bosonic,
heterotic, and type II string theory to order α′ 3, ie, with up to eight derivatives. To this end …

We compute the cosmological reduction of the fourth powers of the Riemann tensor claimed
to arise in string theory at order α′ 3, with an overall coefficient proportional to ζ (3), and …

We introduce a very early universe model based on the thermodynamics of a gas of closed
strings in a background that is nonperturbative in α′. Upon considering the fully α …

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 …