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Asymptotic Homology of Brownian motion on a Riemannian manifold

Authors :
Verjovsky, Alberto
Vila-Freyer, Ricardo F.
Publication Year :
2023

Abstract

We prove, using the celebrated result by Spitzer about winding of planar Brownian motion, and the existence of harmonic morphisms $f:M\to{\mathbb S}^1$ representing cohomology classes in $\text{H}^1(M,\mathbb Z)$, that there is a stochastic process $H_t:{\mathcal C}(M)\to{\text{Hom}(\text{H}^1(M;\mathbb R), \mathbb R)}\simeq{\text{H}_1(M;\mathbb R)}$ ($t\in[0,\infty)$), where ${\mathcal C}(M)= \{ \alpha:[0, \infty) \to M :\alpha \,\, \text{is continuous} \}$, which has a multivariate Cauchy distribution i.e. such that for each nontrivial cohomology class $[\omega]\in{\text{H}^1(M;\mathbb R), \mathbb R)}$, represented by a closed 1-form $\omega$, in the de Rham cohomology, the process $A^\omega_t:{\mathcal C}(M)\to\mathbb R\,$ ($t\in[0,\infty)$) with $A^\omega_t(B)=H_t(B)([\omega]),\, B\in{\mathcal C}(M)$ converges in distribution, with respect to Wiener measure on ${\mathcal C}(M)$, to a Cauchy's distribution, with parameter 1. The process describes the ``homological winding" of the Brownian paths in $M$, thus it can be regarded as a generalization of Spitzer result. The last section discusses the asymptotic behavior of holonomy along Brownian paths.<br />Comment: The principal result is incorrect. The distributions proposed are properly normalized Normal distributions and it leaves open the fascinating question of the asymptotic behavior of homology classes of Brownian paths

Details

Database :
arXiv
Publication Type :
Report
Accession number :
edsarx.2312.13215
Document Type :
Working Paper