2nd Carroll Workshop

When?

From 12 September 2022 to 16 September 2022

Where?

Campus Polytech - Bâtiment Houdain

More information

Continue on the related website

A workshop on “Carrollian physics” took place at the University of Mons from the 12th to the 16th of September.

Carrollian physics? What is it?

Non-relativistic, or Galilean, physics can be obtained from Einstein’s theory of special relativity in the limit in which the speed of light tends to infinity. Carrollian space-times are obtained in the alternative limit in which the speed of light tends to zero. This limit, whose properties were studied for the first time by J.-M. Levy-Leblond in 1965, is quite disorienting from a physical point of view.

In fact, the physical laws thus obtained are so surprising (one could say so crazy) that J.-M. Levy-Leblond suggested naming them after Lewis Carroll: he pointed out that, like this new physics, Alice in Wonderland‘s adventures often seem to make fun of temporal causality.

The Carrollian limit may seem, at first sight, very difficult to justify physically. At a closer look, however, one realises that this limit arises in multiple contexts within the framework of general relativity: when we approach the singularity of the Big-Bang; when the cosmological constant in the AdS/CFT correspondence tends to zero; when one studies the physical processes taking place at the horizon of a black hole. These are all examples, among many others, of Carrollian limits.

It is therefore unsurprising that Carrollian physics has recently played a key role in several directions of research, including holographic and fluid/gravity correspondences, the study of asymptotically flat spacetimes at their null boundaries and the BMS symmetries associated with them, the study of the geometry of light-like hypersurfaces such as the horizons of black holes or the cosmological apparent horizons.

The main purpose of the CARROLL WORKSHOP is to gather people who are currently participating to this research endeavor. Anyone engaged in the fascinating Carrollian research effort is most welcome to join us to take this opportunity to share innovative ideas and perhaps create new collaborative motions.

Download the poster and the program! For more information, please visit also the workshop website!

Arjun BAGCHI (IIT Kanpur) | The unusual effectiveness of Carroll CFTs [slides]
Stefano BAIGUERA (Ben-Gurion U. of the Negev) | Conformal Carroll scalars with boosts [slides]
Xavier BEKAERT (U. Tours) | Higher-spin extensions of BMS algebra [slides]
Jan DE BOER (Uva Amsterdam) | Comment on Carroll Quantum Fields [blackboard talk]
Arnaud DELFANTE (UMONS) | Holographic Lorentz and Carroll Frames [slides]
Laura DONNAY (SISSA) | Gravitational S-matrix, celestial CFT and Carrollian holography [slides]
Sudipta DUTTA (IIT Kanpur) | Scattering Amplitudes: Celestial and Carrollian [slides]
José FIGUEROA-O’FARRILL (U. Edinburgh) | The many faces of Carroll/Galilei duality [slides]
Adrien FIORUCCI (TU Wien) | Hamiltonian Mechanics with external sources [slides]
Christophe GOELLER (LMU Munich) | BMS algebra in 3d and 4d BF theory [slides]
Jelle HARTONG (U. Edinburgh) | What is a Carroll fluid? [blackboard talk]
Leonhard KEHRBERGER (U. Cambridge) | The Case Against Smooth Null Infinity [slides]
Charles MARTEAU (U. British Columbia) | A Celestial Matrix Model [cancelled]
Lionel MASON (U. Oxford) | An open sigma model for celestial gravity [slides]
Kevin MORAND (Sogang U.) | Embedding Galilean and Carrollian geometries [slides]
Jean-Philippe NICOLAS (U. Brest) | Conformal scattering theory [slides]
Francisco PALOMO (U. Malaga) | Cartan geometries with model the lightlike cone [slides]
Noémie PARRINI (UMONS) | Homogenous super-Carrollian manifolds for the super Poincaré group [slides]
Simon PEKAR (UMONS) | Magnetic Carrollian gravity from the Carroll algebra [slides]
Romain RUZZICONI (TU Wien) | A Carrollian Perspective on Celestial Holography [slides]
Jakob SALZER (ULB Brussels) | An effective action for superrotation vacua at null infinity [slides]
Ali SERAJ (ULB Brussels) | Gyroscopic Gravitational Memory [blackboard talk]
Konstantinos SIAMPOS (National and Kapodistrian U. of Athens) | Aspects of Relativistic, Galilean and Carrollian fluids [slides]
Juan VALIENTE-KROON (Queen Mary U.) | BMS charges at the cylinder at spatial infinity [slides]
Matthieu VILATTE (CPHT – Ecole Polytechnique) | A revisit of the Carrollian scalar field [slides]
Wolfgang WIELAND (IQOQI Vienna) | Boundaries, dissipation and gravitational charge [slides]