The tropical parametrization conjecture for the quantum lamination basis

From papers

Let sl3\mathfrak{sl}_3-laminations with pinnings on a marked surface Σ\Sigma form the integral parameter space Lsl3p(Σ,Z)\mathcal{L}_{\mathfrak{sl}_3}^p(\Sigma,\mathbb{Z}). Let IXq\mathbb{I}_{\mathcal{X}}^q be the quantum trace map, let AiiinI{A_i}_{iin I} be the quantum cluster associated with a vertex ω\omega of the exchange graph, and let x(ω)=(xi)iinIx^{(\omega)}=(x_i)_{iin I} denote the corresponding negative shear-coordinate system.

Tropical parametrization conjecture. The basis IXq(Lsl3p(Σ,Z))\mathbb{I}_{\mathcal{X}}^q(\mathcal{L}_{\mathfrak{sl}_3}^p(\Sigma,\mathbb{Z})) is parametrized by tropical points. Namely, for every integral sl3\mathfrak{sl}_3-lamination L^\widehat{L}, the quantum Laurent expression of IXq(L^)\mathbb{I}_{\mathcal{X}}^q(\widehat{L}) in the quantum cluster has leading term

iIAixi(L^)\prod_{i\in I}A_i^{x_i(\widehat{L})}

with respect to the dominance order.

This is the expected connection between the lamination parametrization and the tropical-point framework underlying quantum Fock--Goncharov duality. The supplied text does not state whether the conjecture has been resolved.

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Sources & referencesView supporting material

Primary source

Tsukasa Ishibashi and Shunsuke Kano, “Unbounded sl_3-laminations and their shear coordinates”, arXiv:2204.08947 (2024).

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