Local stationarity in exponential last-passage percolation

Marton Balazs, Ofer Busani*, Timo Seppalainen

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review


We consider point-to-point last-passage times to every vertex in a neighbourhood of size delta*N^{2/3} at distance N from the starting point. The increments of the last-passage times in this neighbourhood are shown to be jointly equal to their stationary versions with high probability that depends only on delta. Through this result we show that
(1) the Airy_2 process is locally close to a Brownian motion in total variation;
(2) the tree of point-to-point geodesics from every vertex in a box of side length delta*N^{2/3} going to a point at distance N agrees inside the box with the tree of semi-infinite geodesics going in the same direction;
(3) two point-to-point geodesics started at distance N^{2/3} from each other, to a point at distance N, will not coalesce close to either endpoint on the scale N.
Our main results rely on probabilistic methods only.
Original languageEnglish
Number of pages36
JournalProbability Theory and Related Fields
Publication statusPublished - 15 Mar 2021

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