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arXiv · 1508.00353

Non-Universality of Nodal Length Distribution for Arithmetic Random Waves

Domenico Marinucci·Giovanni Peccati·Maurizia Rossi·Igor Wigman
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Abstract

"Arithmetic random waves" are the Gaussian Laplace eigenfunctions on the two-dimensional torus (Rudnick and Wigman (2008), Krishnapur, Kurlberg and Wigman (2013)). In this paper we find that their nodal length converges to a non-universal (non-Gaussian) limiting distribution, depending on the angular distribution of lattice points lying on circles. Our argument has two main ingredients. An explicit derivation of the Wiener-It\^o chaos expansion for the nodal length shows that it is dominated by its $4$th order chaos component (in particular, somewhat surprisingly, the second order chaos component vanishes). The rest of the argument relies on the precise analysis of the fourth order chaotic component.

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Domenico Marinucci, Giovanni Peccati, Maurizia Rossi, Igor Wigman. 2015-08-03. Non-Universality of Nodal Length Distribution for Arithmetic Random Waves. https://arxiv.org/abs/1508.00353

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