Global Dynamics of small data solutions to the Derivative Nonlinear Schr\”odinger Equation

Allison Byars (U of Wisconsin)

May 14. 2024, 15:15 — 15:30

$L^2$-well-posedness for the derivative nonlinear Schrödinger equation (DNLS) was recently proved by Harrop-Griffiths, Killip, Ntekoume, and Vi\c{s}an. The next natural question to ask is, "what does the solution look like?", i.e. does it disperse in time at a rate similar to the linear solution or does it admit solitons? In 2014, Ifrim and Tataru introduced the method of wave packets in order to prove a dispersive decay estimate for NLS. The idea of wave packets is to find an approximate solution to the equation which is localized in both space and frequency, and use this to prove an estimate on the nonlinear solution. In this talk, assuming small and localized data, we will explore how this method can be applied to the DNLS equation to prove a global in time dispersive estimate. 

 

 

Further Information
Venue:
ESI Boltzmann Lecture Hall
Associated Event:
Nonlinear Waves and Relativity (Thematic Programme)
Organizer(s):
Roland Donninger (U of Vienna)
David Fajman (U of Vienna)
Birgit Schörkhuber (U of Innsbruck)