Three-point connectivity constant for $q$-state Potts spin clusters

Fuente: arXiv
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Auteurs principaux: Cai, Gefei, Liu, Haoyu, Wu, Baojun, Zhuang, Zijie
Format: Preprint
Publié: 2025
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author Cai, Gefei
Liu, Haoyu
Wu, Baojun
Zhuang, Zijie
author_facet Cai, Gefei
Liu, Haoyu
Wu, Baojun
Zhuang, Zijie
contents Recently, Ang--Cai--Sun--Wu (2024) determined the three-point connectivity constant for two-dimensional critical percolation, confirming a prediction of Delfino and Viti (2010). In this paper, we address the analogous problem for planar critical $q$-state Potts spin clusters. We introduce a continuum three-point connectivity constant and compute it explicitly. Under the scaling-limit conjecture for Potts spin clusters, this quantity coincides with the scaling limit of the properly normalized probability that three points lie in the same spin cluster. The resulting formula agrees with the imaginary DOZZ formula up to an explicit $q$-dependent constant with a geometric interpretation. This answers a question from Delfino--Picco--Santachiara--Viti (2013). The proof exploits the coupling between CLE and LQG, together with the BCLE descriptions of $q$-state Potts scaling limits due to Miller--Sheffield--Werner (2017) and Köhler-Schindler and Lehmkühler (2025).
format Preprint
id arxiv_https___arxiv_org_abs_2510_05850
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle Three-point connectivity constant for $q$-state Potts spin clusters
Cai, Gefei
Liu, Haoyu
Wu, Baojun
Zhuang, Zijie
Probability
60J67, 60D05, 81T40
Recently, Ang--Cai--Sun--Wu (2024) determined the three-point connectivity constant for two-dimensional critical percolation, confirming a prediction of Delfino and Viti (2010). In this paper, we address the analogous problem for planar critical $q$-state Potts spin clusters. We introduce a continuum three-point connectivity constant and compute it explicitly. Under the scaling-limit conjecture for Potts spin clusters, this quantity coincides with the scaling limit of the properly normalized probability that three points lie in the same spin cluster. The resulting formula agrees with the imaginary DOZZ formula up to an explicit $q$-dependent constant with a geometric interpretation. This answers a question from Delfino--Picco--Santachiara--Viti (2013). The proof exploits the coupling between CLE and LQG, together with the BCLE descriptions of $q$-state Potts scaling limits due to Miller--Sheffield--Werner (2017) and Köhler-Schindler and Lehmkühler (2025).
title Three-point connectivity constant for $q$-state Potts spin clusters
topic Probability
60J67, 60D05, 81T40
url https://arxiv.org/abs/2510.05850