English

Liouville quantum gravity weighted by conformal loop ensemble nesting statistics

Probability 2024-08-30 v2 Mathematical Physics math.MP

Abstract

We study Liouville quantum gravity (LQG) surfaces whose law has been reweighted according to nesting statistics for a conformal loop ensemble (CLE) relative to nN0n\in \mathbb{N}_0 marked points z1,,znz_1,\dots,z_n. The idea is to consider a reweighting by B{1,,n}eσBNB\prod_{B\subseteq \{1,\dots,n\}} e^{\sigma_B N_B}, where σBR\sigma_B\in\mathbb{R} and NBN_B is the number of CLE loops surrounding the points ziz_i for iBi\in B. This is made precise via an approximation procedure where as part of the proof we derive strong spatial independence results for CLE. The reweighting induces logarithmic singularities for the Liouville field at z1,,znz_1,\dots,z_n with a magnitude depending explicitly on σ1,,σn\sigma_1,\dots,\sigma_n. We define the partition function of the surface, compute it for n{0,1}n\in\{0,1\}, and derive a recursive formula expressing the n>1n>1 point partition function in terms of lower-order partition functions. The proof of the latter result is based on a continuum peeling process previously studied by Miller, Sheffield and Werner in the case n=0n=0, and we derive an explicit formula for the generator of a boundary length process that can be associated with the exploration for general nn. We use the recursive formula to partly characterize for which values of (σB ⁣:B{1,,n})(\sigma_B\colon B\subseteq \{1,\dots,n\}) the partition function is finite. Finally, we give a new proof for the law of the conformal radius of CLE, which was originally established by Schramm, Sheffield, and Wilson.

Keywords

Cite

@article{arxiv.2204.09905,
  title  = {Liouville quantum gravity weighted by conformal loop ensemble nesting statistics},
  author = {Nina Holden and Matthis Lehmkuehler},
  journal= {arXiv preprint arXiv:2204.09905},
  year   = {2024}
}

Comments

96 pages, 9 figures

R2 v1 2026-06-24T10:54:17.345Z