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Ancestral lineages for a branching annihilating random walk
Pascal Oswald
https://arxiv.org/abs/2403.19483 https://arxiv.org/pdf/2403…

Ancestral lineages for a branching annihilating random walk
We study ancestral lineages of individuals of a stationary discrete-time branching annihilating random walk (BARW) on the $d$-dimensional lattice $\mathbb{Z}^d$. Each individual produces a Poissonian number of offspring with mean $μ$ which then jump independently to a uniformly chosen site with a fixed distance $R$ of their parent. By interpreting the ancestral lineage of such an individual as a random walk in a dynamical random environment, we obtain a law of large numbers and a functional ce…