L'organisation du Système Solaire et la description des mouvements qui le caractérisent ont constitué le cœur de l'astronomie pendant de siècles depuis l'antiquité. Cette science appelée Mécanique Céleste qui repose sur la théorie de la gravitation a connu son heure de gloire au XIXe siècle, avant de passer au second plan devant l'essor de l'astrophysique. […]

As the LHC accumulates data, the need grows for more efficient methods to compute scattering amplitudes. One such method manages to swap the difficult problem of integrating thousands of Feynman diagrams for a much simpler one: solving a system of linear equations. This can be done when there is a known "alphabet" of appropriate singularities […]

We will present a new approach to the problem of quantising integrable systems of differential-difference equations. The main idea is to lift these systems to systems defined on free associative algebras and look for the ideals there  that are stabilized by the dynamics of the lifted systems. In a reasonable class of candidate ideals, there […]

 I will describe a new phenomenon in quantum cosmology: self-organised localisation. When the fundamental parameters of a theory are functions of a scalar field subject to large fluctuations during inflation, quantum phase transitions can act as dynamical attractors. As a result, the theory parameters are probabilistically localised around the critical value and the Universe finds […]

The Einstein Telescope (ET), a wide-band, future 3G gravitational wave detector, is to have expected detection rates of $sim 10^5 - 10^6$ BBH detections and $sim 7 times 10^4$ BNS detections in one year. The coalescence of compact binaries with total mass 20 - 100 $M_{odot}$, as typical of BH-BH or BH-NS binaries, will be […]