Classification of the eternal solutions and multiple coalescing shocks in the KPZ fixed point

Fuente: arXiv
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Autores principales: Bhattacharjee, Sudeshna, Busani, Ofer, Sorensen, Evan
Formato: Preprint
Publicado: 2026
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author Bhattacharjee, Sudeshna
Busani, Ofer
Sorensen, Evan
author_facet Bhattacharjee, Sudeshna
Busani, Ofer
Sorensen, Evan
contents We give a complete classification of the eternal solutions for the KPZ fixed point. Each of these is a (possibly infinite) patching together of the known eternal solutions, called Busemann functions. The resulting evolution of the KPZ fixed point exhibits a shock at each of the boundaries between the different Busemann functions. Moving forward in time, the shocks coalesce, while moving backwards in time, additional shocks can form. We describe several geometric properties of this tree of shocks.
format Preprint
id arxiv_https___arxiv_org_abs_2605_26048
institution arXiv
publishDate 2026
record_format arxiv
spellingShingle Classification of the eternal solutions and multiple coalescing shocks in the KPZ fixed point
Bhattacharjee, Sudeshna
Busani, Ofer
Sorensen, Evan
Probability
Mathematical Physics
60K35
We give a complete classification of the eternal solutions for the KPZ fixed point. Each of these is a (possibly infinite) patching together of the known eternal solutions, called Busemann functions. The resulting evolution of the KPZ fixed point exhibits a shock at each of the boundaries between the different Busemann functions. Moving forward in time, the shocks coalesce, while moving backwards in time, additional shocks can form. We describe several geometric properties of this tree of shocks.
title Classification of the eternal solutions and multiple coalescing shocks in the KPZ fixed point
topic Probability
Mathematical Physics
60K35
url https://arxiv.org/abs/2605.26048