Gradient Growth for Vlasov-Poisson in background charge distributed by Desingularized Dirac Delta

We prove the superlinear gradient growth for the one dimensional Vlasov-Poisson equation on the torus. We show them by first constructing the stationary solution which has a hyperbolic flow (locally). Then we perturb the solution and use the $L^{\mathrm{\infty }}$ stability of the characteristic velocity field to show the superlinear growth. This proof was inspired by the work of Denisov.