Black-Hole Microstructure VIII

10 juin 2026, 09:30 → 12 juin 2026, 18:30 Europe/Paris

Amphi Bloch, Salle Itzykson (IPhT, CEA Saclay)

Dates:  June 10 - 12  

 

Zoom link:  

https://us06web.zoom.us/j/98362331712?pwd=L1loNXAzVHZ6d0VDL2c4R0ZKQjRJQT09

Meeting ID: 983 6233 1712
Passcode: 12345

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The microscopic description of black holes has been a challenge for more that forty years.  There are now quite a number of promising approaches to solving this problem and the primary goal of this small conference is to bring together experts in these areas to identify synergies, engage in constructive criticism and resolve apparent conflicts. 

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Programme:

TBA

Confirmed Speakers:

Antoine Bourget

Alexandru Dima

Sean Colin-Ellerin

Hao Geng

Ji Hoon Lee

Pierre Heidmann

Marcel Hughes

Emil Martinec

Stefano Massai

Masaki Shigemori

David Turton

Haoyu Zhang

Organizers: Iosif Bena and Nick Warner

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Previous meetings

 

Black-Hole Microstructure VII

Black-Hole Microstructure VI

Black-Hole Microstructure V

Black-Hole Microstructure IV 

Black-Hole Microstructure III

Black-Hole Microstructure II

Black-Hole Microstructure I

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Youtube links to talks in the  Saclay Strings Youtube channel 

 

 

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mer. 10 juin

10:00 → 11:00 Emil Martinec - Truthful Hyperbolae: an AdS/CFT black hole S-matrix?

Truthful Hyperbolae: an AdS/CFT black hole S-matrix?

11:30 → 12:30 Ji Hoon Lee - Polar states in AdS3 holography

14:30 → 15:30 Pierre Heidmann

16:00 → 17:00 Alexandru Dima - Microstate geometries on a grid

jeu. 11 juin

10:00 → 11:00 Sean Colin-Ellerin - Sensitivity of BPS microstates

11:30 → 12:30 Haoyu Zhang - Two Windows into the D1D5 System: Fortuity and Chaos

14:30 → 15:30 Masaki Shigemori -The Resolved Elliptic Genus and the D1-D5 CFT

We introduce a new supersymmetry index, dubbed the resolved elliptic
genus (REG), for the D1-D5 CFT on T^4. In a novel formulation of the
CFT at the symmetric orbifold point based on the Schur-Weyl duality, we
show how the REG can be naturally described and its protection is argued
based on a selection rule derived from the action of the deformed
supercharge. The REG is a one-parameter generalization of the standard
index, the modified elliptic genus (MEG), and gives more fine-grained
information about the structure of microstates than previously
available. We demonstrate precise matching of the REG between
supergravity and CFT below the black-hole threshold, where the MEG is
trivial. Above the threshold, we uncover a decomposition of black-hole
microstates into distinct sectors, invisible to the MEG. We expect both
the new formalism and the REG to provide useful tools for studying the
structure of black-hole microstates. In particular, we comment on their
possible relevance to the fortuity program for understanding black-hole
microstates within CFT.

16:00 → 17:00 Marcel Hughes - Towering Gravitons in AdS3/CFT2

ven. 12 juin

10:00 → 11:00 Antoine Bourget - Zooming out of AdS4×S2×S2: The Branes behind the CFT

11:30 → 12:30 Hao Geng - Recent Progress in Quantum Gravity

I will review the recent progress in quantum gravity. The goal is to convey the follow three messages:

1. Most, if not all, of the problems in quantum gravity, i.e. black holes and closed universes, can be naturally understood in the Karch-Randall braneworld.

2. Karch-Randall braneworld has a clear string theory realization.

3. This calls for attention from string theory community to open the portal between string theory and quantum gravity.

14:30 → 15:30 Stefano Massai

16:00 → 17:00 David Turton - Probing the microstructure of heavy states in String Theory