École Normale Supérieure Summer Institute 2024

Session

Formal theory

20 juin 2024, 11:00

Présidents de session

Formal theory

• Il n'a pas de président de session pour ce bloc

Formal theory

• Il n'a pas de président de session pour ce bloc

Formal theory

• Il n'a pas de président de session pour ce bloc

Formal theory

• Il n'a pas de président de session pour ce bloc

Formal theory

• Il n'a pas de président de session pour ce bloc

Formal theory

• Miguel Fernandes Paulos (Ecole Normale Superieure)

Formal theory

• Miguel Fernandes Paulos (Ecole Normale Superieure)

Formal theory

• Miguel Fernandes Paulos (Ecole Normale Superieure)

Formal theory

• Miguel Fernandes Paulos (Ecole Normale Superieure)

Formal theory

• Il n'a pas de président de session pour ce bloc

33. No global symmetries and string universality

Prof. Miguel Montero

20/06/2024 11:00

13. Lower-dimensional gravity, DSSYK and group theory

Thomas Mertens (University of Ghent, Belgium)

20/06/2024 14:00

In this talk, I will report on recent process in understanding lower-dimensional gravitational models structurally from group theory. The main strength of this approach seems to be its universality in describing different models. In particular, I will discuss how it can be used to argue for a bulk holographic dual of double-scaled SYK (DSSYK) in terms of sine dilaton gravity.

15. The Parisi-Sourlas Uplift and Infinitely Many Solvable 4d CFTs

Emilio Trevisani (CNRS - Sorbonne Université)

20/06/2024 15:30

Parisi-Sourlas (PS) supersymmetry is known to emerge in some models with random field type of disorder. When PS SUSY is present the d-dimensional theory allows for a d−2-dimensional description. In this paper we investigate the reversed question and we provide new indications that any given CFT_{d−2} can be uplifted to a PS SUSY CFT_d. We show that any scalar four-point function of a CFT_{d−2}...

17. Arithmetic Chaos Inside Black Holes

Sean Hartnoll (University of Cambridge)

21/06/2024 11:30

It has been known for over 50 years that spacetime dynamics becomes chaotic in the approach to singularities. Furthermore, the classical gravitational dynamics exhibits remarkable number-theoretic properties known as arithmetic chaos. I will review these facts and give an explicit realisation of these phenomena in the interior of an asymptotically AdS black hole. I will discuss possible...

18. Tracking celestial and Carrollian theories

Laura Donnay (SISSA)

21/06/2024 14:30

In this talk, I will present recent developments towards formulating a holographic correspondence for asymptotically flat spacetimes. In particular, I will discuss the role of newly uncovered symmetries in the so-called celestial and Carrollian holographic proposals.

2. Nonrelativistic conformal field theory

Prof. Dam Son

22/06/2024 11:00

We will review the notions of Schrödinger symmetry and nonrelativistic conformal field theory, in particular the restrictions that Schrödinger symmetry imposes on correlation function and the operator-state correspondence. We will then consider the most important example of NRCFT --- fermions at unitarity, and derive physical consequences of the formalism.

3. The dual of semi-classical gravity

Prof. Jan de Boer

24/06/2024 11:00

Recent work has produced a consistent picture of the holographic dual description of semi-classical gravity. I will describe this picture, several applications of this picture including the factorization puzzle and the information paradox, and some open questions.

4. Energy Reflection and Transmission at 2D Holographic Interfaces

Prof. Shira Chapman

24/06/2024 14:00

Scattering from conformal interfaces in two dimensions is universal in that the flux of reflected and transmitted energy does not depend on the details of the initial state. In this talk, I will present two gravitational calculations of the energy reflection and transmission coefficients for interfaces with holographic duals. I will first consider a thin-brane holographic toy model which is...

5. The entropy of Holographic CFTs at large charge and angular momentum

Prof. Shiraz Minwalla

25/06/2024 11:00

Black holes in AdS$_d$ (with $d\ geq 4$) are always unstable at large angular momentum, and sometimes unstable at large charge. In this talk we present proposals for the end point of these instabilities. Our constructions suggest new entropy formulae for ${\cal N}=4$ Yang-MIlls in the neighbourhood of extremality, and and in particular on the BPS manifold.

6. Toward stringy horizons

Prof. Hong Liu

25/06/2024 14:00

16. Cryptographic Censorship: A Quantum Complexity Approach to (Quantum) Cosmic Censorship

Netta Engelhardt (MIT)

Do naked singularities exist as typical states in quantum gravity? Various considerations, from black hole thermodynamics to empirical observations, suggest that the answer is no. Nevertheless, in the past decade, numerous generic solutions to GR in four spacetime dimensions have been found to be likely candidates for naked singularity formation. In this talk, I’ll give evidence that such...