Mot du Directeur

• Jean-René Chazottes

Constraining the Orbital Angular Momentum content of the proton

• Renaud Boussarie

Hybrid fluid/kinetic simulations of Alfvén Eigenmodes and the need for kinetic magnetostatic equilibria

• Timothee Nicolas

Majorana bound states in topological superconductors coupled to photons

• Olesia Dmytruk

Embedding quantum materials in photonic cavities provides a promising avenue to probe and control properties of these materials. I will discuss a topological superconductor that hosts Majorana bound states coupled to cavity photons. I will demonstrate how coupling to cavity photons could be used to probe signatures of the Majorana bound states in long electronic chains. Moreover, I will show that cavity embedding could be used to realise so-called “poor man’s Majorana bound states” in short electronic chains.

Linear dynamical stability of hydrodynamics and the laws of thermodynamics

• Blaise Goutéraux

The low energy dynamics of interacting systems are described at late times and long distances by hydrodynamics. I will show that hydrodynamic theories are dynamically stable under linear perturbations provided the system is locally thermodynamically stable and the second law of thermodynamics is obeyed.

Ultrashort laser pulse filamentation and applications

• Arnaud Couairon

Ultrashort laser pulse filamentation is an intense light propagation phenomenon occurring in air, gases, and glasses. It leads to laser-matter interactions over extended distances which enable the remote generation of plasma channels and secondary radiation, such as super-continuum spectra and THz radiation. Numerous applications have been proposed based on the potential of filamentation to generate remote sources of electrons and secondary radiation. In this presentation, I will discuss the key mechanisms that sustain light filaments over long distances. Then, I will present several applications that have been investigated experimentally and through simulations, including laser-guided discharges, femtosecond laser micro-machining of glasses, filament-based detection of atmospheric pollutants, and the generation of underwater acoustic signals by femtosecond lasers.

Confinement and the infrared structure of Landau gauge-fixed Yang-Mills theories

• Urko Reinosa

Poincaré et ses limites

• Marios Petrolopoulos

The Poincaré group is at the heart of Einstein's description of spacetime. Its non-relativistic limit, the Galilean group, is adapted to physics at velocities that are small compared with the speed of light. There is another limit, called the Carrollian limit, obtained formally as a zero-speed-of-light limit. Despite its exotic nature, this limit has found a vast field of applications in the study of the asymptotic symmetries of certain types of spacetimes, in the description of the horizons of black holes, and in the formulation of the ultra-relativistic limit of fluids.

On asymptotically free scalar fields

• Christoph Kopper

Things you might want to know about materials with strong Coulomb correlations

• Evgeny Stepanov

Filippo Vicentini

• Filippo Vicentini

Freezing phase transitions in lattice models and toy-models of quasicrystals

• Jean-René Chazottes

Surprisingly, the understanding of simple models within the framework of classical lattice statistical mechanics, which exhibit a phase transition between a disordered phase and an ordered (crystalline or quasi-crystalline) phase, has only progressed recently, notably through the use of ideas from dynamical systems. I will attempt to put things into perspective and discuss some very recent results.

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