Gevrey regularity for the Vlasov-Poisson system

Abstract

We prove propagation of $\frac{1}{s}$-Gevrey regularity $(s\in (0,1])$ for the Vlasov-Poisson system on ${\mathbb{T}}^d\times {\mathbb{R}}^d$ using a Fourier space method in analogy to the results proved for the 2D-Euler system in [20] and [23]. More precisely, we give quantitative estimates for the growth of the $\frac{1}{s}$-Gevrey norm and decay of the regularity radius for the solution of the system in terms of the force field and the volume of the support in the velocity variable of the distribution of matter. As an application, we show global existence of $\frac{1}{s}$-Gevrey solutions ($s\in (0,1)$) for the Vlasov-Poisson system in ${\mathbb{T}}^3\times {\mathbb{R}}^3$. Furthermore, the propagation of Gevrey regularity can be easily modified to obtain the same result in ${\mathbb{R}}^d\times {\mathbb{R}}^d$. In particular, this implies global existence of analytic $(s=1)$ and $\frac{1}{s}$-Gevrey solutions ($s\in (0,1)$) for the Vlasov-Poisson system in ${\mathbb{R}}^3\times {\mathbb{R}}^3$.