Number variance of random zeros

Details Number variance of random zeros Number variance of random zeros

2005-12-30

arxiv.org/abs/math/0512652v3

Mathematics

Complex Variables

31 pages. Additional results on noncompact domains in Section 2.2; corrected some typos and the statement of a result

Scientific paper

The main results of this article are asymptotic formulas for the variance of the number of zeros of a Gaussian random polynomial of degree $N$ in an open set $U \subset C$ as the degree $N \to \infty$, and more generally for the zeros of random holomorphic sections of high powers of any positive line bundle over any Riemann surface. The formulas were conjectured in special cases by Forrester and Honner. In higher dimensions, we give similar formulas for the variance of the volume inside a domain $U$ of the zero hypersurface of a random holomorphic section of a high power of a positive line bundle over any compact K\"ahler manifold. These results generalize the variance asymptotics of Sodin and Tsirelson for special model ensembles of chaotic analytic functions in one variable to any ample line bundle and Riemann surface. We also combine our methods with those of Sodin-Tsirelson to generalize their asymptotic normality results for smoothed number statistics.

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