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16/09/2025, 09:25
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Bergshoeff16/09/2025, 09:30
I will discuss so-called non-relativistic p-brane limits of (the bosonic part)
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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... -
Julia16/09/2025, 10:50
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Vandoren16/09/2025, 11:40
We discuss N=2 supergravity theories in four dimensions and connect it with
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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. -
Rosseel16/09/2025, 14:00
In this talk, I will outline the construction of a non-relativistic limit of 11-
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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... -
Nunez16/09/2025, 14:50
I will discuss recent progress in the duality between gauge fields and strings,
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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. -
16/09/2025, 16:10
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Sagnotti17/09/2025, 09:30
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Lozano17/09/2025, 10:50
I will discuss recent interpretations of AdS3 solutions as holographic duals
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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... -
Toldo17/09/2025, 11:40
From the perspective of classical gravity, a black hole is the simplest object
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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... -
Tomasiello17/09/2025, 14:00
I will discuss new classes of supersymmetry-breaking AdS vacua in string
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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... -
Samtleben17/09/2025, 14:50
A particularly interesting corner of the holographic dualities is the corre-
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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.... -
Bobev17/09/2025, 16:10
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Gauntlett17/09/2025, 17:00
Important BPS quantities, including central charges, black hole entropy and
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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... -
Van Proeyen18/09/2025, 09:30
Combinations of dimensional reduction and dualities will be discussed leading
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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... -
Dall'Agata18/09/2025, 10:50
We discuss the perturbative stability of susy breaking Minkowski vacua in
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supergravity compactifications on Riemann-flat manifolds. -
Hull18/09/2025, 11:40
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.
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Guarino18/09/2025, 14:00
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...
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Hohm18/09/2025, 14:50
I give an overview of homotopy algebras such as L∞ algebras as a tool for su-
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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... -
Frè18/09/2025, 16:10
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...
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