Electrodynamics from Noncommutative Geometry

Abstract

Within the framework of Connes' noncommutative geometry, the notion of an almost commutative manifold can be used to describe field theories on compact Riemannian spin manifolds. The most notable example is the derivation of the Standard Model of high energy physics from a suitably chosen almost commutative manifold. In contrast to such a non-abelian gauge theory, it has long been thought impossible to describe an abelian gauge theory within this framework. The purpose of this paper is to improve on this point. We provide a simple example of a commutative spectral triple based on the two-point space, and show that it yields a U(1) gauge theory. Then, we slightly modify the spectral triple such that we obtain the full classical theory of electrodynamics on a curved background manifold.

16 pages

References in corpus (2)

• Gravity and the standard model with neutrino mixing
• On a Classification of Irreducible Almost-Commutative Geometries IV

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• Spectral distances on doubled Moyal plane using Dirac eigen-spinors
• Geometric foundations for classical $\mathrm{U}(1)$-gauge theory on noncommutative manifolds
• Supersymmetry and noncommutative geometry Part III: The noncommutative supersymmetric Standard Model
• Supersymmetry and noncommutative geometry Part II: Supersymmetry breaking
• Morita "equivalences" of equivariant torus spectral triples
• Supersymmetry and the Spectral Action. On a geometrical interpretation of the MSSM
• A critical survey of twisted spectral triples beyond the Standard Model