Wed, 19 Feb 2025
11:00
L4

A new take on ergodicity of the stochastic 2D Navier-Stokes equations

Dr Jonas Tölle
(Aalto University)
Abstract

We establish general conditions for stochastic evolution equations with locally monotone drift and degenerate additive Lévy noise in variational formulation resulting in the existence of a unique invariant probability measure for the associated ergodic Markovian Feller semigroup. We prove improved moment estimates for the solutions and the e-property of the semigroup. Examples include the stochastic incompressible 2D Navier-Stokes equations, shear thickening stochastic power-law fluid equations, the stochastic heat equation, as well as, stochastic semilinear equations such as the 1D stochastic Burgers equation.

Joint work with Gerardo Barrera (IST Lisboa), https://arxiv.org/abs/2412.01381

New Order were formed after the death of Ian Curtis ended the career of Joy Division. At first they struggled. They seemed to, er, quite like dance music and the first album was over-produced. But when 'Temptation' was released you knew something was afoot. Brilliant drumming, years ahead of its time and worth waiting for the lines towards the end: 'oh you've got green eyes, oh you've got blue eyes, oh you've got grey eyes'. Yes, a love song. 

More famous songs were to come, but any better than this?

Thu, 06 Feb 2025
17:00
L6

Parametrising complete intersections

Jakub Wiaterek
(University of Oxford )
Abstract

For some values of degrees d=(d_1,...,d_c), we construct a compactification of a Hilbert scheme of complete intersections of type d. We present both a quotient and a direct construction. Then we work towards the construction of a quasiprojective coarse moduli space of smooth complete intersections via Geometric Invariant Theory.

Multilevel irreversibility reveals higher-order organisation of non-equilibrium interactions in human brain dynamics
Nartallo-Kaluarachchi, R Bonetti, L Fernandez-Rubio, G Vuust, P Deco, G Kringelbach, M Lambiotte, R Goriely, A Proceedings of the National Academy of Sciences volume 122 issue 10 (07 Mar 2025)
Multilevel irreversibility reveals higher-order organization of nonequilibrium interactions in human brain dynamics
Nartallo-Kaluarachchi, R Bonetti, L Fernández-Rubio, G Vuust, P Deco, G Kringelbach, M Lambiotte, R Goriely, A Proceedings of the National Academy of Sciences volume 122 issue 10 (07 Mar 2025)
A simple theory for quantum quenches in the ANNNI model
Robertson, J Senese, R Essler, F (10 Jan 2023)
Decay of long-lived oscillations after quantum quenches in gapped interacting quantum systems
Robertson, J Senese, R Essler, F (10 Jul 2023)
Out-of-equilibrium full counting statistics in Gaussian theories of quantum magnets
Senese, R Robertson, J Essler, F (18 Dec 2023)
Gapped phases with non-invertible symmetries: (1+1)d
Bhardwaj, L Bottini, L Pajer, D Schäfer-Nameki, S SciPost Physics volume 18 issue 1 032 (24 Jan 2025)
Subscribe to