A Sharp condition on global wellposedness of Chern-Simons-Schr\"odinger equation

TL;DR

This paper establishes a precise mass threshold for the global well-posedness of the Chern-Simons-Schr"odinger equation, revealing how interaction strength influences solution existence and behavior.

Contribution

It provides a sharp mass condition for global solutions and characterizes the nature of standing waves depending on interaction strength.

Findings

Global existence depends on initial mass and interaction strength.

Standing wave solutions exist at critical mass with zero energy.

Solutions are static or non-static based on self-interacting field size.

Abstract

In this work, we derive a sharp condition on the mass of the initial data for the global existence of the Chern-Simons-Schr\"odinger equation. As a corollary, we prove that if the strength of interaction is less than the Bogomolny bound, then, for a large enough mass of initial data, there exists a globally defined solution. On the other hand, for the interactions which are above the Bogomolny bound, the critical mass condition on the initial data for the global existence depends on the strength of the self-interacting field. Then, we show that the states with the initial critical mass and zero energy are standing wave solutions and globally well-posed. Moreover, they are static if the self-interacting field is large enough and non-static for small self-interacting field.