On Quantum Modularity for Geometric 3-Manifolds

Fuente: arXiv
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Main Authors: Putrov, Pavel, Singh, Ayush
Format: Preprint
Published: 2025
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author Putrov, Pavel
Singh, Ayush
author_facet Putrov, Pavel
Singh, Ayush
contents The quantum modularity conjecture, first introduced by Don Zagier, is a general statement about a relation between $\mathfrak{sl}_2$ quantum invariants of links and 3-manifolds at roots of unity related by a modular transformation. In this note we formulate a strong version of the conjecture for Witten--Reshetikhin--Turaev invariants of closed geometric, not necessarily hyperbolic, 3-manifolds. This version in particular involves a geometrically distinguished $SL(2,\mathbb{C})$ flat connection (a generalization of the standard hyperbolic flat connection to other Thurston geometries) and has a statement about the integrality of coefficients appearing in the modular transformation formula. We prove that the conjecture holds for Brieskorn homology spheres and some other examples. We also comment on how the conjecture relates to a formal realization of the $\mathfrak{sl}_2$ quantum invariant at a general root of unity as a path integral in analytically continued $SU(2)$ Chern--Simons theory with a rational level.
format Preprint
id arxiv_https___arxiv_org_abs_2512_10768
institution arXiv
publishDate 2025
record_format arxiv
spellingShingle On Quantum Modularity for Geometric 3-Manifolds
Putrov, Pavel
Singh, Ayush
Geometric Topology
High Energy Physics - Theory
Mathematical Physics
Quantum Algebra
The quantum modularity conjecture, first introduced by Don Zagier, is a general statement about a relation between $\mathfrak{sl}_2$ quantum invariants of links and 3-manifolds at roots of unity related by a modular transformation. In this note we formulate a strong version of the conjecture for Witten--Reshetikhin--Turaev invariants of closed geometric, not necessarily hyperbolic, 3-manifolds. This version in particular involves a geometrically distinguished $SL(2,\mathbb{C})$ flat connection (a generalization of the standard hyperbolic flat connection to other Thurston geometries) and has a statement about the integrality of coefficients appearing in the modular transformation formula. We prove that the conjecture holds for Brieskorn homology spheres and some other examples. We also comment on how the conjecture relates to a formal realization of the $\mathfrak{sl}_2$ quantum invariant at a general root of unity as a path integral in analytically continued $SU(2)$ Chern--Simons theory with a rational level.
title On Quantum Modularity for Geometric 3-Manifolds
topic Geometric Topology
High Energy Physics - Theory
Mathematical Physics
Quantum Algebra
url https://arxiv.org/abs/2512.10768