English

Harmonic maps and framed $\mathrm{PSL}_2(\mathbb{C})$-representations

Differential Geometry 2025-08-15 v1 Geometric Topology

Abstract

We show that given an element XX of the enhanced Teichm\"{u}ller space T±(S,M)\mathcal{T}^\pm(\mathbb{S}, \mathbb{M}) and a type-preserving framed PSL2(C)\mathrm{PSL}_2(\mathbb{C})-representation ρ^=(ρ,β)\hat{\rho} = (\rho,\beta), there is a ρ\rho-equivariant harmonic map f:H2H3f:\mathbb{H}^2 \to \mathbb{H}^3 that is asymptotic to the framing β\beta. Here, the domain is the universal cover of the punctured Riemann surface obtained from a conformal completion of XX. Moreover, such a harmonic map is unique if one prescribes, in addition, the principal part of the Hopf differential at each puncture. The proof uses the harmonic map heat flow.

Keywords

Cite

@article{arxiv.2508.10335,
  title  = {Harmonic maps and framed $\mathrm{PSL}_2(\mathbb{C})$-representations},
  author = {Subhojoy Gupta and Gobinda Sau},
  journal= {arXiv preprint arXiv:2508.10335},
  year   = {2025}
}

Comments

27 pages, 3 figures

R2 v1 2026-07-01T04:49:15.689Z