Simultaneous global inviscid Burgers flows with periodic Poisson forcing

TL;DR

This paper constructs and analyzes global solutions with shocks for the inviscid Burgers equation on the circle under Poisson forcing, revealing how solutions change with mean parameter and extending previous viscous case results.

Contribution

It introduces a method to construct global solutions with shocks for the inviscid Burgers equation with Poisson forcing and characterizes their dependence on the mean parameter.

Findings

Global solutions with mean  for all  constructed

Global shocks are unique except on a countable set of 

Solution changes only through shock movement as  varies

Abstract

We study the inviscid Burgers equation on the circle $\mathbb{T}:=\mathbb{R}/\mathbb{Z}$ forced by the derivative of a Poisson point process on $\mathbb{R}\times\mathbb{T}$. We construct global solutions with mean $\theta$ simultaneously for all $\theta\in\mathbb{R}$, and in addition construct their associated global shocks (which are unique except on a countable set of $\theta$). We then show that as $\theta$ changes, the solution only changes through the movement of the global shock, and give precise formulas for this movement. This is an analogue of previous results by the author and Yu Gu in the viscous case with white-in-time forcing, which related the derivative of the solution in $\theta$ to the density of a particle diffusing in the Burgers flow.