Davide Cassani
New Holographic Tools from Generalised Geometry
Generalised geometry is a formalism tailor made to address string compactifications with fluxes, its main virtue being that it unifies the metric and the form fields. As such, it provides a general framework to construct consistent truncations, thus shedding light on the connection between lower-dimensional gauged supergravities and string theory. One can also use it to efficiently study the spectrum of flux solutions, and answer questions about their stability and their moduli space. The talk will review the basic formalism of exceptional generalised geometry and some of its most recent applications, with a focus on holography.
Shai Chester
Bootstrapping quantum gravity
We describe how results from the numerical bootstrap and supersymmetric localization can be used to constrain, and even fix, the scattering of gravitons in AdS both in a small Planck length expansion, and non-perturbatively. We also present intriguing evidence for the existence of pure supergravity.
Jerome Gauntlett
GK geometry and AdS/CFT
We consider supersymmetric AdS_3\times Y_7 solutions of type IIB and $AdS_2\times Y_9$ solutions of $D=11$ supergravity. The internal spaces $Y_7,Y_9$ are examples of GK geometry. We review the progress in understanding GK geometry over the past few years which has allowed us to identify infinite new classes of AdS_3/d=2 SCFT pairs, as well obtain a microstate counting interpretation for infinite classes of supersymmetric black holes in AdS_4. A sub-class of examples correspond to branes wrapping certain two-dimensional orbifolds known as spindles and this has opened up a new direction in AdS/CFT with novel connections to accelerating black holes.
Frikdrik Gautason
From Janus interfaces to holographic conformal manifolds
I will discuss holographic duals to Janus interfaces in N=4 SYM and how they lead to novel J-fold SCFTs in three dimensions. In particular I will discuss holographic conformal manifolds of 3D N=1, and N=2 SCFTs and describe some of their features.
Adolfo Guarino
Type IIB S-folds: deformations, stability and holography
In this talk I will discuss recent progress towards understanding geometric and holographic aspects of type IIB S-fold solutions of the form AdS4 x S1 x S5. Using an effective 4D description of the S-folds, I will focus on the existence of flat directions in the 4D scalar potential which are expected to describe (non-)supersymmetric marginal deformations of the dual S-fold CFT’s.
Yolanda Lozano
Low dimensional holography, defects and string dualities
We discuss different AdS3/CFT2 and AdS2/CFT1 dual pairs recently proposed in a series of papers. We focus on the defect interpretation of some of these dual pairs as describing line defects within higher dimensional CFTs. We emphasize the role played by string dualities in these constructions.
Dario Martelli
Gravitational Blocks, Spindles and GK Geometry
We derive a gravitational block formula for the supersymmetric action of a general class of supersymmetric AdS solutions, described by GK geometry. Extremal points of this action describe supersymmetric AdS_3 solutions of type IIB supergravity, sourced by D3-branes, and supersymmetric AdS_2 solutions of D=11 supergravity, sourced by M2-branes. In both cases, the branes are also wrapped over a two-dimensional orbifold known as a spindle. We develop geometric methods for computing the gravitational block contributions, allowing us to recover previously known results for various explicit supergravity solutions, and significantly generalizing these results to other compactifications. Our gravitational block formula agrees with various conjectural expressions in the literature, and extend those to a much broader class of solutions, including supersymmetric and accelerating black holes in AdS_4.
Sameer Murthy
Supersymmetric phases of AdS/CFT
I will discuss a universal infinite set of saddles of the superconformal index of gauge theories, labelled by rational numbers. These saddles can be interpreted as orbifolds of AdS black holes in the dual gravitational theory. This statement holds for AdS_{d+1}/CFT_d for d=2,3,4, and possibly all d.
Silvia Nagy
From amplitudes to gravity and back (via symmetries)
I will give an overview of recent developments in the double copy: the idea that (super)gravity can be constructed from two (super)Yang-Mills theories. Though originating in amplitudes, the idea has since spread to many aspects of these theories, including symmetries, dualities and classical solutions. Time permitting, I will also touch upon the view from null infinity, and potential connections to celestial holography.
Silviu Pufu
Taming quantum corrections: scattering amptliudes and correlation functions
I will mainly review how analytic bootstrap conditions and supersymmetric localization can be used to determine the some correlation functions of 1/2-BPS operators in N=4 super-Yang-Mills theory at the first few orders in the strong coupling expansion. I will also discuss how these computations are related to scattering amplitudes in superstring theory, as well as various other related ideas.
Oliver Schlotterer
Duality constraints on string amplidues
We discuss the structures in supergravity that capture the holomorphic data of the dual field theory, focussing the case of N=1, d=4 SCFTs. We will in particular see how they encode the short-multiplet spectrum in both generic type IIB and M-theory backgrounds and discuss some possible extensions.
David Turton
Black Holes, Dualities, and Holography
In this overview talk I will set the scene for today's focus question, "What can dualities and holography teach us about black holes?". I will review a selection of recent developments related to this broad, active research area. This will include a status review and outlook on the construction and study of black hole microstates in String Theory.
Christoph Uhlemann
TBA
Daniel Waldram
Holomorphic structures in holography
We discuss the structures in supergravity that capture the holomorphic data of the dual field theory, focussing the case of N=1, d=4 SCFTs. We will in particular see how they encode the short-multiplet spectrum in both generic type IIB and M-theory backgrounds and discuss some possible extensions.