中文

动力学Brownian最后路径渗透中的测地线开关与异常时刻

概率论 2025-11-03 v1

摘要

我们考虑通过离散重抽样程序动态演化的Brownian最后路径渗透。令Γ(0,0)(n,n),r\Gamma_{(0,0)}^{(n,n),r}表示从(0,0)(0,0)(n,n)(n,n)在时刻rr的测地线,我们证明了在时段[s,t][s,t]内,Γ(0,0)(n,n),r\Gamma_{(0,0)}^{(n,n),r}从其端点处累积的粗化变化(或“开关”)的预期数量最多为n5/3+o(1)(ts)n^{5/3+o(1)}(t-s);我们期望指数5/35/3是紧致的。利用上述估计,我们证明了异常时刻集合T\mathscr{T}——即在这些时刻几乎必然存在非平凡双无限测地线的集合——的Hausdorff维数最多为1/21/2。进一步地,对于任意固定方向θ\theta,我们显示的是向沿θ\theta方向的非平凡双无限测地线存在的时刻集合TθT\mathscr{T}^\theta\subseteq\mathscr{T}的Hausdorff维数等于00

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引用

@article{arxiv.2510.27589,
  title  = {Geodesic switches and exceptional times in dynamical Brownian last passage percolation},
  author = {Manan Bhatia},
  journal= {arXiv preprint arXiv:2510.27589},
  year   = {2025}
}

备注

60 pages, 12 figures. This preprint is one of two works that together replace the earlier preprint arXiv:2504.12293v1. The companion article arXiv:2504.12293v2 proves a quantitative "near-existence" result for non-trivial bigeodesics in dynamical exponential last passage percolation