November 2023 From the asymmetric simple exclusion processes to the stationary measures of the KPZ fixed point on an interval
Włodek Bryc, Yizao Wang, Jacek Wesołowski
Author Affiliations +
Ann. Inst. H. Poincaré Probab. Statist. 59(4): 2257-2284 (November 2023). DOI: 10.1214/22-AIHP1315

Abstract

Barraquand and Le Doussal (Europhys. Lett. 137 (2022) 61003) introduced a family of stationary measures for the (conjectural) KPZ fixed point on an interval with Neumann boundary conditions, and predicted that they arise as scaling limits of stationary measures of all models in the KPZ universality class on an interval. In this paper, we show that the stationary measures for KPZ fixed point on an interval arise as the scaling limits of the height increment processes for the open asymmetric simple exclusion process in the steady state, with parameters changing appropriately as the size of the system tends to infinity.

Barraquand et Le Doussal (Europhys. Lett. 137 (2022) 61003) ont introduit une famille de mesures stationnaires pour le point fixe KPZ (conjectural) sur un intervalle avec conditions de Neumann aux bords. Ils ont prédit qu’elles apparaissent comme limites d’échelle des mesures stationnaires dans tous les modèles de la classe d’universalité KPZ sur un intervalle. Dans cet article, nous montrons que les mesures stationnaires pour le point fixe KPZ sur un intervalle apparaissent comme limites d’échelle du processus des accroissements de la hauteur du processus d’exclusion simple asymétrique ouvert à l’état stable, avec des paramètres changeants de façon appropriée lorsque la taille du système tend vers l’infini.

Acknowledgement

The authors thank Ivan Corwin and Alisa Knizel for sharing an early version of [14]. We thank Guillaume Barraquand for information about Ref. [2] and the discussion of its contents. We also thank Alexey Kuznetsov for several discussions that inspired Proposition 4.10.

WEB’s research was partially supported by Simons Foundation/SFARI Award Number: 703475, US. YW’s research was partially supported by Army Research Office, US (W911NF-20-1-0139). JW’s research was partially supported by grant IDUB no. 1820/366/201/2021, Poland.

Citation

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Włodek Bryc. Yizao Wang. Jacek Wesołowski. "From the asymmetric simple exclusion processes to the stationary measures of the KPZ fixed point on an interval." Ann. Inst. H. Poincaré Probab. Statist. 59 (4) 2257 - 2284, November 2023. https://doi.org/10.1214/22-AIHP1315

Information

Received: 7 June 2022; Revised: 9 September 2022; Accepted: 13 September 2022; Published: November 2023
First available in Project Euclid: 3 November 2023

Digital Object Identifier: 10.1214/22-AIHP1315

Subjects:
Primary: 60F05 , 60K35
Secondary: 82C22

Keywords: Asymmetric simple exclusion process , KPZ fixed point on an interval , Scaling limit

Rights: Copyright © 2023 Association des Publications de l’Institut Henri Poincaré

Vol.59 • No. 4 • November 2023
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