English

Spectral gap for Weil-Petersson random surfaces with cusps

Spectral Theory 2022-10-25 v4

Abstract

We show that for any ϵ>0\epsilon>0, α[0,12)\alpha\in[0,\frac{1}{2}), as gg\to\infty a generic finite-area genus g hyperbolic surface with n=O(gα)n=O\left(g^{\alpha}\right) cusps, sampled with probability arising from the Weil-Petersson metric on moduli space, has no non-zero eigenvalue of the Laplacian below 14(2α+14)2ϵ\frac{1}{4}-\left(\frac{2\alpha+1}{4}\right)^{2}-\epsilon. For α=0\alpha=0 this gives a spectral gap of size 316ϵ\frac{3}{16}-\epsilon and for any α<12\alpha<\frac{1}{2} gives a uniform spectral gap of explicit size.

Cite

@article{arxiv.2107.14555,
  title  = {Spectral gap for Weil-Petersson random surfaces with cusps},
  author = {Will Hide},
  journal= {arXiv preprint arXiv:2107.14555},
  year   = {2022}
}

Comments

39 pages. Final version

R2 v1 2026-06-24T04:41:06.110Z