Torus equivariant spectral triples for odd dimensional quantum spheres coming from $C^*$-extensions
Loading...
Date
Journal Title
Journal ISSN
Volume Title
Publisher
Abstract
Description
The torus group $(S^1)^{\ell+1}$ has a canonical action on the odd dimensional sphere $S_q^{2\ell+1}$. We take the natural Hilbert space representation where this action is implemented and characterize all odd spectral triples acting on that space and equivariant with respect to that action. This characterization gives a construction of an optimum family of equivariant spectral triples having nontrivial $K$-homology class thus generalizing our earlier results for $SU_q(2)$. We also relate the triple we construct with the $C^*$-extension \[
0\longrightarrow \clk\otimes C(S^1)\longrightarrow C(S_q^{2\ell+3})
\longrightarrow C(S_q^{2\ell+1}) \longrightarrow 0. \]
LaTeX2e, 12 pages
LaTeX2e, 12 pages