Conjectural graded dimension formula for the torus state space

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Let Σ=S1×S1\Sigma=S^1\times S^1 and let ω∈H1(S1×S1;Z/2Z)\omega\in H^1(S^1\times S^1;{\mathbb Z}/2{\mathbb Z}). For a graded vector space, write dim⁡s\dim_s for the sum over k∈Zk\in{\mathbb Z} of sks^k times the dimension of its degree-kk subspace. The conjecture. The graded dimension of the associated state space satisfies:

  1. If r∈2Z+1r\in2{\mathbb Z}+1, then
dim⁡s(V(S1×S1))=3r−12.\dim_s\left(\mathbb{V}(S^1\times S^1)\right)=\frac{3r-1}{2}.
  1. If r∈4Z+2r\in4{\mathbb Z}+2 and ω≠0\omega\neq0, then
dim⁡s(V(S1×S1))=3r−24.\dim_s\left(\mathbb{V}(S^1\times S^1)\right)=\frac{3r-2}{4}.
  1. If r∈4Z+2r\in4{\mathbb Z}+2 and ω=0\omega=0, then
dim⁡s(V(Σ))=s−1+3r+24+s.\dim_s\left(\mathbb{V}(\Sigma)\right)=s^{-1}+\frac{3r+2}{4}+s.

These formulas conjecturally extend the computed dimensions from generic to non-generic cohomology classes, including the case where the relevant period of ω\omega is integral. They give the expected graded dimensions of the skein-module state space for a solid torus bounding the torus.

References

Primary source

Christian Blanchet, Francesco Costantino, Nathan Geer and Bertrand Patureau-Mirand, “Non semi-simple TQFTs, Reidemeister torsion and Kashaev's invariants”, arXiv:1404.7289 (2014).

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