Canonical quantization and the spectral action, a nice example

Details Canonical quantization and the spectral action, a nice example Canonical quantization and the spectral action, a nice example

2007-02-08

arxiv.org/abs/gr-qc/0702049v2

J.Geom.Phys.57:1757-1770,2007

Astronomy and Astrophysics

Astrophysics

General Relativity and Quantum Cosmology

A footnote on p 10 added wrt published version

Scientific paper

10.1016/j.geomphys.2007.02.007

We study the canonical quantization of the theory given by Chamseddine-Connes spectral action on a particular finite spectral triple with algebra $M_2(\Cset)\oplus\Cset$. We define a quantization of the natural distance associated with this noncommutative space and show that the quantum distance operator has a discrete spectrum. We also show that it would be the same for any other geometric quantity. Finally we propose a physical Hilbert space for the quantum theory. This spectral triple had been previously considered by Rovelli as a toy model, but with a different action which was not gauge-invariant. The results are similar in both cases, but the gauge-invariance of the spectral action manifests itself by the presence of a non-trivial degeneracy structure for our distance operator.

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