Seminar Event Detail

Integrable Systems and Random Matrix Theory

Date:  Monday, January 31, 2022
Location:  ZOOM ID: 926 6491 9790 Virtual (9:00 AM to 10:00 AM)

Title:  Airy process and Korteweg-de Vries equation

Abstract:   I will report on joint works with M. Cafasso, C. Charlier, T. Claeys, in which we study a new class of Korteweg-de Vries solutions. They are built out of certain multiplicative expectations of the Airy point process and they generalize the self-similar solution associated with the Hastings-McLeod PainlevĂ© II transcendent; in general they are associated with a specific solution, again characterized by an Airy limiting behavior, of an "integro-differential" generalization of the PainlevĂ© II equation. The solutions are unbounded and the classical scattering-inverse scattering theory cannot be applied; however, they can be characterized through a Riemann-Hilbert problem, which allows to study rigorously and precisely their small time asymptotics, which we do uniformly in the space variable. A special case of the construction provides refined tail asymptotics for a specific solution ("narrow-wedge solution") of the Kardar-Parisi-Zhang stochastic equation. Depending on time I will comment on some more recent generalizations.

A recoding of the talk can be found here.


Speaker:  Giulio Ruzza
Institution:  UniversitĂ© Catholique de Louvain

Event Organizer:   Ahmad Barhoumi


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