Beyond Lorentzian Geometry II

Contribution List

1. Review talk: Non-relativistic gravity and non-Lorentzian geometry

Niels Obers

2/6/23, 9:30 AM

I will review Newton-Cartan gravity with an emphasis on recent developments, including the covariant, off-shell large speed of light expansion of general relativity. Depending on the matter content, this expansion either leads to Newton-Cartan geometry with absolute time or to Newton-Cartan geometry with non-relativistic gravitational time dilation effects. The latter shows that...

2. Comment on Carroll Quantum Fields

Jan de Boer

2/6/23, 11:00 AM

3. QFT in Galilean Superspace

Silvia Penati

2/6/23, 11:45 AM

I will discuss quantum properties of galilean N=2 supersymmetric theories in d =2+1, primarily focusing on the non-relativistic version of the Wess-Zumino model and SuperQED. Compared with their relativistic cousins, these models exhibit very different behavior. The non-relativistic Wess-Zumino model is one-loop exact, as a consequence of robust non-renormalisation theorems. The...

4. Towards a hydrodynamic theory for condensed matter systems

Jay Armas

2/6/23, 2:00 PM

I will discuss a new hydrodynamic theory using Aristotelian geometry that accounts for pinning, phase, and momentum relaxation effects due to translational disorder, diffusion due to the presence of interstitials and vacancies, and strain relaxation due to plasticity and dislocations. I will focus on signatures of plastic deformations in electronic crystals and show that proliferation of...

5. The Panorama of Spin Matrix Theory

Troels Harmark

2/6/23, 3:15 PM

I will review some of the features of Spin Matrix theory to motivate why it seems a promising road to a non-relativistic version of the holographic correspondence. As part of this I will mention recent progress on the understanding of the Spin Matrix theory that should include a black hole as its dual.

18. Carrollian black holes

Daniel Grumiller

2/6/23, 4:00 PM

7. Review Talk: Some aspects of non-relativistic strings

Gerben Oling

2/7/23, 9:30 AM

It has been known for some time that there exists a self-consistent limit of string theory with a non-relativistic spectrum. Over the last few years, many aspects of the resulting non-relativistic string theory have been developed, including its coupling to curved non-Lorentzian backgrounds. In this talk, by means of the analogous constructions for non-relativistic point particles, I will...

8. Non-relativistic massive higher-spin modes in the Fractional Quantum Hall Effect

Giandomenico Palumbo

2/7/23, 11:00 AM

It is quite well known that quantum area-preserving diffeomorphisms play a key role in the fractional quantum Hall states (FQHs) and explain, for instance, the incompressibility of the quantum Hall fluids. Moreover, quantum area-preserving diffeomorphisms in two space dimensions are naturally encoded in the so-called Girvin-MacDonald-Plazman (GMP) algebra or in its dual version known as...

9. Higher-form symmetries and topological phase transitions

Akash Jain

2/7/23, 11:45 AM

Symmetries and their breaking patterns are a valuable tool in physics for classifying and describing phases of matter. In recent years, a new generalised notion of symmetries has emerged, dubbed "higher-form symmetries", where the associated conserved charges are carried by higher-dimensional objects like strings and surfaces, instead of the usual point-like particles. In this talk, I will...

10. Carroll Stories

Stefan Vandoren

2/7/23, 2:00 PM

11. Gravitational S-matrix and Carrollian holography

Laura Donnay

2/7/23, 3:15 PM

In this talk, I will present recent advances towards a holographic formulation of gravity in asymptotically flat spacetime in terms of a putative conformal Carrollian field theory living at null infinity. I will also comment on how this approach relates to the celestial holography program.

12. A New Consistent Limit of Eleven-Dimensional Supergravity

Eric Bergshoeff

2/7/23, 4:00 PM

13. Review Talk: Quirks, Novelties, and Curiosities of Fractons

Kevin Grosvenor

2/8/23, 9:30 AM

A Fracton is an excitation whose mobility when in isolation is restricted by various types of symmetry (e.g., multipole or subsystem symmetries). However, when these come together, the composite states they form may move much more freely. I will briefly discuss the history of this field and point out some of the conceptual puzzles that have fueled their study. I will focus particularly on the...

14. Non-Lorentzian Torus and SL(2, Z) Duality

Ziqi Yan

2/8/23, 11:00 AM

I will talk about some recent progress on non-perturbative SL(2,Z) duality in nonrelativistic string theory, which is a self-contained string theory that has a string spectrum with a Galilean invariant dispersion relation. I will show that the SL(2,Z) duality in this string theory exhibits intriguing new structure. This study provides a precursor towards realizing novel U-duality relations...

15. Geometry of the super Null Infinity

Noémie Parrini

2/8/23, 11:45 AM

Through the study of homogeneous spaces and thanks to the orbit decomposition of compactified super Minkowski space, I will discuss different geometrical aspects of the supersymmetric version of Null Infinity. The purpose is to tend to a proposition of definition for a super conformal carrollian geometry.

16. Non-Lorentzian theories with or without constraints

Joaquim Gomis

2/8/23, 2:00 PM

We exhibit a new method of constructing further non-Lorentzian models by applying a method we refer to as starting from a so-called seed Lagrangian. This method typically produces additional constraints in the system that can drastically alter the physical content of the model. We demonstrate our method for particles, strings, scalars, vector fields and JT gravity.

17. The Carrollian Kaleidoscope

Arjun Bagchi

2/8/23, 3:15 PM