We survey on-shell and off-shell higher derivative supergravities in dimensions 1≤ D≤ 11.
Various approaches to their construction, including the Noether procedure,(harmonic) …

In this review we describe a non-trivial relationship between perturbative gauge theory and
gravity scattering amplitudes. At the semi-classical or tree-level, the scattering amplitudes of …

A bstract We study the space of all kinematically allowed four photon and four graviton S-
matrices, polynomial in scattering momenta. We demonstrate that this space is the …

We derive rigorous bounds on corrections to Einstein gravity using unitarity and analyticity of
graviton scattering amplitudes. In D≥ 4 spacetime dimensions, these consistency conditions …

A bstract Recently a swampland criterion has been proposed that rules out de Sitter vacua in
string theory. Such a criterion should hold at all points in the field space and especially at …

The late-time behavior of our universe is one of accelerated expansion, or that of a de Sitter
space, and therefore motivates us to look for time-dependent backgrounds. Finding such …

A proposal is made for a cosmological D3-D7 model with a constant magnetic flux along the
D7 world volume. It describes an N= 2 gauge model with Fayet-Iliopoulos terms and the …

Using AdS 7/CFT 6 correspondence we compute a subleading O (N) term in the scale
anomaly of (2, 0) theory describing N coincident M5 branes. While the leading O (N 3) …

We construct a ultraviolet completion of the bosonic sector of 11-dimensional supergravity
motivated by string field theory. We start from a general class of theories characterized by an …

The first quantum correction to the IIA string effective action arises at the eight-derivative
level and takes the schematic form (t8t8− 18ϵ10ϵ10) R4+ B2∧ X8. This correction …