## Diff. Geom, Math. Phys., PDE Seminar: Stefan Le Coz

• Date: 10/14/2014
• Time: 15:30
Lecturer(s):
Stefan Le Coz, Toulouse
Location:

University of British Columbia

Topic:

On the blow-up speed for modified critical nonlinear Schrödinger equations

Description:
So far, only two blow-up regimes have been studied for NLS equations: the pseudo-conformal regime, where the blow-up speed is like $|t| ^{-1}$ and the log-log regime where the blow-up speed is like $|t|^{-1/2}$ with a log-log correction.

In this talk, we consider the nonlinear Schrodinger with a double power nonlinearity where one of the power is L2 critical and the other one is L2-subcritical. We construct a minimal mass blowing up solution whose blow-up speed is  neither the log-log speed nor the pseudo-conformal speed, but is of the type $|t|^{-s}$ with $s$ varying between $1/2$ and $1$ depending on the subcritical power. This is based on a joint work with Yvan Martel and Pierre Raphael.