Complex systems and Biological physics seminar [before December 2013]

Nodal line statistics for arithmetic random waves

by Pär Kurlberg (KTH)

Europe/Stockholm
Description
Using spectral multiplicities of the Laplacian acting on the standard two-torus, we endow the each eigenspace with a Gaussian probability measure. This induces a notion of a random eigenfunctions on the torus, and we study the statistics of nodal lengths of the eigenfunctions in the high energy limit. In particular, we determine the variance for a generic sequence of energy levels, and also find that the variance can be different for certain "degenerate" subsequences.