Semiclassical Weyl law for flat quantum tori

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Let Tθn\mathbb{T}^n_\theta be the quantum torus, let Δ\Delta be its flat Laplacian, let q>0q>0, set r=2nq−1r=2nq^{-1}, and suppose that either r≠1r\neq 1 and r′=max⁡(r,1)r'=\max(r,1), or r=1<r′r=1<r'. For a selfadjoint potential V=V∗∈Lr′(Tθn)V=V^*\in L_{r'}(\mathbb{T}^n_\theta), let N(h2qΔq+V;λ)N(h^{2q}\Delta^q+V;\lambda) be the counting function at energy λ∈R\lambda\in\mathbb{R}. Semiclassical Weyl-law conjecture for flat quantum tori. For every λ∈R\lambda\in\mathbb{R},

lim⁡h→0+hnN(h2qΔq+V;λ)=c^(n)τ0[(V−λ)−n2q],c^(n):=∣Bn∣.\lim_{h\rightarrow 0^+} h^nN\big(h^{2q}\Delta^q+V;\lambda\big) = \hat{c}(n)\tau_0\big[(V-\lambda)_{-}^{\frac{n}{2q}}\big], \qquad \hat{c}(n):=|\mathbb{B}^n|.

This was presented as a conjectured semiclassical Weyl law for flat quantum tori; the source gives no resolution.

References

Primary source

Raphael Ponge, “Noncommutative Geometry, Spectral Asymptotics, and Semiclassical Analysis”, arXiv:2604.15008 (2026).

Additional references

2 papers in this index state this conjecture (2021–2026). The statement above is taken from the most recent of them; the others are arXiv:2102.12021.

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