Equidistribution conjecture for unstable periodic points of heterochaos baker maps

Let (a,b)Δ(a,b)\in\Delta, let ff be the corresponding heterochaos baker map on [0,1]3[0,1]^3, and let μα\mu_\alpha and μβ\mu_\beta be the two ergodic measures of maximal entropy. Denote by Fixα(fn)\operatorname{Fix}_\alpha(f^n) and Fixβ(fn)\operatorname{Fix}_\beta(f^n) the sets of α\alpha- and β\beta-type fixed points of fnf^n. For every continuous function ϕ ⁣:[0,1]3R\phi\colon[0,1]^3\to\mathbb R, Equidistribution conjecture. For any (a,b)Δ(a,b)\in\Delta and any continuous function ϕ ⁣:[0,1]3R\phi\colon[0,1]^3\to\mathbb R,

limn1#Fixα(fn)xFixα(fn)ϕ(x)=ϕdμα\lim_{n\to\infty}\frac{1}{\#\operatorname{Fix}_{\alpha}(f^n)}\sum_{x\in\operatorname{Fix}_{\alpha}(f^n)}\phi(x)=\int\phi\,\mathrm d\mu_{\alpha}

and

limn1#Fixβ(fn)xFixβ(fn)ϕ(x)=ϕdμβ.\lim_{n\to\infty}\frac{1}{\#\operatorname{Fix}_{\beta}(f^n)}\sum_{x\in\operatorname{Fix}_{\beta}(f^n)}\phi(x)=\int\phi\,\mathrm d\mu_{\beta}.

This predicts that the two unstable periodic-point populations equidistribute toward the two ergodic measures of maximal entropy.

Sources & referencesView supporting material

Primary source

Yoshitaka Saiki, Hiroki Takahasi, Kenichiro Yamamoto and James A. Yorke, “The dynamics of the heterochaos baker maps”, arXiv:2401.00836 (2024).

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