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Niels Obers06/02/2023, 09:30
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...
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Jan de Boer06/02/2023, 11:00
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Silvia Penati06/02/2023, 11:45
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...
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Jay Armas06/02/2023, 14:00
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...
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Troels Harmark06/02/2023, 15:15
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.
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Daniel Grumiller06/02/2023, 16:00
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Gerben Oling07/02/2023, 09:30
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...
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Giandomenico Palumbo07/02/2023, 11:00
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...
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Akash Jain07/02/2023, 11:45
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...
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Stefan Vandoren07/02/2023, 14:00
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Laura Donnay07/02/2023, 15:15
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.
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Eric Bergshoeff07/02/2023, 16:00
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Kevin Grosvenor08/02/2023, 09:30
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...
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Ziqi Yan08/02/2023, 11:00
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...
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Noémie Parrini08/02/2023, 11:45
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.
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Joaquim Gomis08/02/2023, 14:00
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.
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Arjun Bagchi08/02/2023, 15:15
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