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math.AP2026

Dimensional reduction for anyons in the average-field approximation

Qiyun Yang

We study abelian anyons at the mean-field/almost-bosonic level, whose dynamics are governed by the Chern-Simons-Schrödinger system. We consider the dimensional reduction of this 2…

math.AP2026

From bosonic canonical ensembles to non-linear Gibbs measures

van Duong Dinh, Nicolas Rougerie

We study the mean-field limit of the 1D bosonic canonical ensemble in a superharmonic trap. This is the regime with temperature proportional to particle number, both diverging to i…

math.AP2026

The 2D Chern-Simons-Schr{ö}dinger system reduced to 1D

Nicolas Rougerie, Qiyun Yang

We study a mean-field model for a system of 2D abelian anyons, given by the dynamics of a Schr{ö}dinger matter field coupled to a Chern-Simons gauge field. We derive an effective…

math.AP2026

Magnetic Thomas-Fermi theory for 2D abelian anyons

Antoine Levitt, Douglas Lundholm, Nicolas Rougerie

Two-dimensional abelian anyons are, in the magnetic gauge picture, represented as fermions coupled to magnetic flux tubes. For the ground state of such a system in a trapping poten…

math.AP2026

The Cauchy problem for the periodic Kadomtsev--Petviashvili--II equation below

Sebastian Herr, Robert Schippa, Nikolay Tzvetkov

We extend Bourgain's -wellposedness result for the KP-II equation on to initial data with negative Sobolev regularity. The key ingredient is a new linear -…

math.AP2025

Gyrokinetic limit of the 2D Hartree equation in a large magnetic field

Denis Périce, Nicolas Rougerie

We study the dynamics of two-dimensional interacting fermions submitted to a homogeneous transverse magnetic field. We consider a large magnetic field regime, with the gap between…