Supergravity 2025

16 Sept 2025, 09:00 → 18 Sept 2025, 18:00 Europe/Zurich

Turin

Anna Ceresole (INFN TORINO), Carlo Angelantonj (Turin University), Domenico Orlando (INFN TO), Laura Andrianopoli (Politecnico di Torino), Leonardo Castellani (UPO), Lucrezia Ravera (Politecnico), Mario Trigiante (Politecnico di Torino), Pietro Grassi (Universita del Piemonte Orientale (IT))

 

Supergravity 2025 is the 6th edition in a series of workshops held biannually since 2015, where experts in supergravity and superstring theories gather to present their latest results and foster scientific collaboration. 

For information on the previous editions:

Supergravity 2023, Supergravity 2022, Supergravity 2019, Supergravity 2017, Supergravity 2015

The main topics covered in the present edition will include the gauge/gravity holographic correspondence and supergravity solutions to superstring and M-theory dynamics.

 

The present edition of the meeting will include extra talks by some of the main contributors to the construction of the theory, to celebrate the incoming 50th birthday of supergravity.

Invited Speakers

Erik Bergshoeff (Groningen Unv.) 

 

Nicolay Bobev (KU Leuven)

 Gianguido Dall’Agata (University of Padua)

Pietro Fré (Turin Univ.) 

Jerome Gauntlett (Imperial College London)

Adolfo Guarino (University of Oviedo)

Olaf Hohm (Humboldt University of Berlin)

Chris Hull (Imperial College London)

Bernard Julia (École Normale Supérieure)

Yolanda Lozano (University of Oviedo)

Carlos Nunez (Swansea University)

Jan Rosseel (Ruđer Bošković Institute)

Augusto Sagnotti (Scuola Normale Superiore di Pisa)

Henning Samtleben (ENS de Lyon)

Chiara Toldo (Harvard University)

Alessandro Tomasiello (University of Milano-Bicocca)

Stefan Vandoren (Utrecht University)

Antoine Van Proeyen (KU Leuven)

THE REGISTRATION DEADLINE WAS July 31st, 2025. 

Organizers

Laura Andrianopoli, Carlo Angelantonj, Leonardo Castellani, Anna Ceresole, Pietro Antonio Grassi, Ruggero Noris, Domenico Orlando, Lucrezia Ravera, Mario Trigiante

   

Directions to Supergravity 2025

Map in the Lingotto Building (Venue Location)

Poster SUGRA 2025

Tuesday 16 September

09:00 → 09:25 Registration

09:25 → 09:30 Welcome

09:30 → 10:20 Non-relativistic p-brane limits of supergravity

I will discuss so-called non-relativistic p-brane limits of (the bosonic part)
of supergravity in diverse dimensions that lead to a generalized Newton-Cartan gravity
with a Newton potential that satisfies a Poisson equation in the directions transverse to
thep-brane. Iwilldiscussafewgeneralizationsthatmakecontactwithboth(thebosonic
part of) eleven-dimensional supergravity and ten-dimensional heterotic supergravity.

Speaker: Bergshoeff

torino1409_Bergshoeff.pdf

10:20 → 10:50 Break with Coffee

10:50 → 11:40 E8 families from exceptional invariants to Painlevé magics via supergravities

Speaker: Julia

11:40 → 12:30 N=2 Supergravity and the Swampland

We discuss N=2 supergravity theories in four dimensions and connect it with
the swampland program and the distance conjectures. Examples with both vector mul-
tiplets and hypermultiplets will be discussed. An interesting new class of models arises
from freely acting orbifolds in string theory.

Speaker: Vandoren

Vandoren.pdf

12:30 → 14:00 Lunch

14:00 → 14:50 The surprising structure of non-relativistic 11D supergravity

In this talk, I will outline the construction of a non-relativistic limit of 11-
dimensional supergravity that leads to a theory with an underlying membrane Newton-
Cartan geometry. I will argue that consistency of the non-relativistic limit requires the
imposition of constraints, requiring that certain bosonic and fermionic torsions and cur-
vatures vanish. I will show that in one version of these constraints only 16 supersymme-
try transformations are kept, leading to a simple constraint structure in which however
the supersymmetry algebra does not close into diffeomorphisms. Keeping all 32 su-
persymmetry transformations requires a complicated sequence of bosonic and fermionic
constraints, eventually involving three derivatives of bosonic fields. Finally, I will dis-
cuss a family of supersymmetric solutions that satisfy all constraints and that contains
a non-relativistic limit of the M2 supergravity solution that was obtained by Lambert
and Smith as a background relevant for non-relativistic holography

Speaker: Rosseel

Rosseel.pdf

14:50 → 15:40 Aspects of gauge-strings duality

I will discuss recent progress in the duality between gauge fields and strings,
with an emphasis on the Supergravity side of things. The material is taken from the
papers I wrote in the last year. I hope to make the presentation accessible to members
of the audience with different technical expertise.

Speaker: Nunez

Nunes.pdf

15:40 → 16:10 Break with Tea

16:10 → 18:00 Gong Show and Poster Session

Poster and Gong Show

Wednesday 17 September

09:30 → 10:20 Surprises from Non-Supersymmetric Strings

Speaker: Sagnotti

10:20 → 10:50 Coffee at the break

10:50 → 11:40 AdS3/CFT2 and defect CFTs

I will discuss recent interpretations of AdS3 solutions as holographic duals
of surface defect CFTs. One solution will be interpreted as an extension of ABJM
to the massive case, in which one of the external directions becomes an energy scale
and generates a flow towards an AdS3 space. A second solution will be related to
surface defects embedded in 6d (1,0) CFTs living in D6-NS5-D8 brane intersections.
In this second example we will find an interesting connection with the phenomenon of
deconstruction.

Speaker: Lozano

Lozano.pdf

11:40 → 12:30 Thermodynamics of near-extreme rotating black holes

From the perspective of classical gravity, a black hole is the simplest object
we know of. At the same time, it possesses huge entropy, hinting at an incredibly com-
plex microstructure: understanding this fact falls in the realm of quantum gravity. In
this talk I will review recent results concerning the microscopics and the thermody-
namics of near-extreme black holes in asymptotically flat and Anti-de Sitter space. In
the first part, I will describe how recently developed techniques allow to compute the
quantum corrections to the entropy of fast spinning Kerr black holes. I will show that
the quantum-corrected near-extremal entropy exhibits 3/2logT behavior characteristic
of the Schwarzian model, and predicts a lifting of the ground state degeneracy for the
extremal Kerr black hole. In the second part, I will show the computation for the den-
sity of states for fast spinning AdS4 black holes in theories of gauged supergravity. The
solutions admit a supersymmetric limit: I will comment on the spectrum of near-BPS
states and on the interpretation in terms of the dual 3d field theory.

Speaker: Toldo

Toldo2.pdf

12:30 → 14:00 Lunch

14:00 → 14:50 On non-supersymmetric vacua in string theory

I will discuss new classes of supersymmetry-breaking AdS vacua in string
theory. In the first part, using calibrations, I will obtain type II vacua that enjoy partial
or total protection from decays mediated by D-brane bubbles. In the second, I will work
in non-supersymmetric heterotic theory; I will outline a method to obtain solutions on
G/H coset spaces, with H-valued gauge field, and describe several examples.

Speaker: Tomasiello

Tomasiello.pdf

14:50 → 15:40 Supergravity in one dimension

A particularly interesting corner of the holographic dualities is the corre-
spondence between the backgrounds of Dp-branes and their non-conformal field theory
duals. Extrapolating this correspondence to the extremal case of p=-1, suggests a holo-
graphic duality for the IKKT matrix model. The dual D-instanton background is a
half-supersymmetric BPS solution of Euclidean IIB supergravity. I describe the relevant
maximallysupersymmetricone-dimensionalsupergravitytheoryaroundthisbackground
and the match of its fields to the lowest BPS multiplet of gauge invariant operators of
the IKKT model.

Speaker: Samtleben

samtleben-torino_2025.pdf

15:40 → 16:10 Tea and Coffee, this time

16:10 → 17:00 Precision Holography for Dp-branes

Speaker: Bobev

Bobev.pdf

17:00 → 17:50 Localization in Supergravity

Important BPS quantities, including central charges, black hole entropy and
the on-shell action, can be computed for supersymmetric solutions of supergravity with-
out ever solving the Einstein equations or the Killing spinor equations. Instead one
exploits the fact that the solutions have a Killing vector and a set of equivariantly closed
forms. This allows one to compute just by inputting some global data and utilising
the Berligne-Verne-Atiyah-Bott localisation theorem. We explain the formalism and
illustrate with some examples.

Speaker: Gauntlett

Gaunlett.pdf

Thursday 18 September

09:30 → 10:20 Supergravities I and II and their (enhanced) dualities

Combinations of dimensional reduction and dualities will be discussed leading
to type I and type II supergravities in D=4 and D=6 with maximal supersymmetry.
The relations between the different types of supergravity are also connected to choices
of gauge fixing for the representatives of the coset spaces. The preserved manifest global
symmetries differ and this raises questions on gauge equivalence of these theories. (In
collaboration with R. Kallosh and H. Samtleben).

Speaker: Van Proeyen

Supergravities I and II - Torino 2025_v7.pdf

10:20 → 10:50 Coffee, Tea, and Milk break

10:50 → 11:40 Casimir energy and the stability of supergravity vacua

We discuss the perturbative stability of susy breaking Minkowski vacua in
supergravity compactifications on Riemann-flat manifolds.

Speaker: Dall'Agata

202509Supergravity.pdf

11:40 → 12:30 Supergravity from Superstring Field Theory

A new superstring field theory gives a background independent 2nd-quantised formulation of superstring theory. In particular, it gives a novel formulation of the supergravity action with a democratic action for the RR gauge fields. This involves some novel gravitational couplings and the geometry behind these will be discussed.

Speaker: Hull

HullSUGRATorino.pdf

12:30 → 14:00 Lunch

14:00 → 14:50 Scale-separated AdS3 flux vacua of type IIB

The existence of AdS/CFT pairs with scale separation remains an open question, with no explicit examples known to date and doubts raised about their very possibility. In this talk, I will present the first examples of type IIB AdS3​ flux vacua that exhibit parametrically-controlled scale separation. Remarkably, these solutions come equipped with integer-valued conformal dimensions for the would-be dual CFT2 operators, making the task of identifying and understanding the corresponding CFT2s particularly compelling. I will also comment on the implications of our results in light of the Swampland program.

Speaker: Guarino

Guarino-Torino.pdf

14:50 → 15:40 Supergravity, String Theory and Homotopy Algebras

I give an overview of homotopy algebras such as L∞ algebras as a tool for su-
pergravity and other theories. Possible applications include: i)a first-principle derivation
of “double copy", which relates, for instance, N=4 super-Yang-Mills to N=8 supergrav-
ity in D=4; ii) the use of homotopy transfer to transport the Kaluza-Klein spectrum of
exceptional field theory or supergravity on AdS to its boundary; iii) as new foundations
for quantum field theory via factorization algebras.

Speaker: Hohm

Hohm.pdf

15:40 → 16:10 Coffee, Tea, Milk and, some juice, too.

16:10 → 17:00 From Supergravity to Machine Learning: a Mathematical Adventure

In this talk starting from a critical analysis of the existing Neural Networks we illustrate their geometrical reformulation that cures their original sin, namely the use of ad-hoc point-wise activation functions, that are contradictory with covariance and with the supposedly vector space structure of the hidden layers. Starting from first principles, namely the need of a distance function and homogeneity, we identify the hidden layers with non-compact symmetric spaces and show that their characterization as normal Alekseevsky Riemannian spaces is crucial. Non-linearity is provided by the exponential map from solvable Lie algebras to solvable Lie groups and the general form of the map between adjacent hidden layers is reduced to an isometric map, whose core is a solvable Lie algebra homomorphism (the true mathematical nature of the learnable weights) followed by a generic isometry of the next layer (the true mathematical nature of the bias vectors). The implications and the on going developments are briefly outlined.

Speaker: Frè