Conjectured semi-finite spectral triple in the continuum limit

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Let MM be the underlying 3-manifold, let X(M)\mathbb{X}(M) and HϕtH_{\phi^t} be the continuum limits of the corresponding graph-level structures, and let DD be the limiting operator. Let Cl(T∗A)Cl(T^*\mathcal{A}) be the Clifford algebra of the cotangent space of the connection space, and let D(M)\mathbf{D}(M) be the continuum algebra whose trace is induced by matrix traces on Dn(M)\mathbf{D}_n(M).

Continuum spectral-triple conjecture. The Kasparov module

(X(M),Hϕt,D)\\{(\mathbb{X}(M),H_{\phi^t},D)\\}

is a semi-finite spectral triple with respect to the trace over Cl(T∗A)Cl(T^*\mathcal{A}) and the trace over D(M)\mathbf{D}(M) induced by matrix traces over Dn(M)\mathbf{D}_n(M).

Together with the preceding conjecture, this would yield the desired semi-finite spectral triple in the continuum limit. The source does not analyze the existence of DD or the behavior of its spectrum, so the claim remains open.

References

Primary source

Johannes Aastrup and Jesper M. Grimstrup, “C*-algebras of Holonomy-Diffeomorphisms & Quantum Gravity I”, arXiv:1209.5060 (2013).

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