On Landau damping
Abstract
Going beyond the linearized study has been a longstanding problem in the theory of Landau damping. In this paper we establish exponential Landau damping in analytic regularity. The damping phenomenon is reinterpreted in terms of transfer of regularity between kinetic and spatial variables, rather than exchanges of energy; phase mixing is the driving mechanism. The analysis involves new families of analytic norms, measuring regularity by comparison with solutions of the free transport equation; new functional inequalities; a control of nonlinear echoes; sharp scattering estimates; and a Newton approximation scheme. Our results hold for any potential no more singular than Coulomb or Newton interaction; the limit cases are included with specific technical effort. As a side result, the stability of homogeneous equilibria of the nonlinear Vlasov equation is established under sharp assumptions. We point out the strong analogy with the KAM theory, and discuss physical implications.
 Publication:

arXiv eprints
 Pub Date:
 April 2009
 DOI:
 10.48550/arXiv.0904.2760
 arXiv:
 arXiv:0904.2760
 Bibcode:
 2009arXiv0904.2760M
 Keywords:

 Mathematics  Analysis of PDEs;
 Astrophysics  Galaxy Astrophysics;
 Condensed Matter  Statistical Mechanics;
 Physics  Plasma Physics;
 35B35 (35J05;
 62E20;
 70F15;
 82C99;
 85A05;
 82D10;
 35Q60;
 76X05)
 EPrint:
 News: (1) the main result now covers Coulomb and Newton potentials, and (2) some classes of Gevrey data