Conjectured semi-finite spectral triple in the continuum limit

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(TA)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(TA)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.

Sources & referencesView supporting material

Primary source

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

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