Spin Gauge Theory of Gravity in Clifford Space: A Realization of Kaluza-Klein Theory in 4-Dimensional Spacetime

TL;DR

This paper develops a generalized gravity theory in 16-dimensional Clifford space, unifying gravity and gauge interactions, and providing a geometric framework that incorporates the standard model gauge groups within a Kaluza-Klein-like setting.

Contribution

It introduces a Clifford space-based formulation of gravity and gauge fields, extending Kaluza-Klein theory to a 16-dimensional setting with a unified geometric approach.

Findings

Clifford space provides a geometric realization of Kaluza-Klein theory.

The generalized Dirac equation in C-space includes standard and extra gauge interactions.

The spin connection in C-space encompasses gravity, torsion, and gauge fields.

Abstract

A theory in which 4-dimensional spacetime is generalized to a larger space, namely a 16-dimensional Clifford space (C-space) is investigated. Curved Clifford space can provide a realization of Kaluza-Klein theory. A covariant Dirac equation in curved C-space is explored. The generalized Dirac field is assumed to be a polyvector-valued object (a Clifford number) which can be written as a superposition of four independent spinors, each spanning a different left ideal of Clifford algebra. The general transformations of a polyvector can act from the left and/or from the right, and form a large gauge group which may contain the group U(1)xSU(2)xSU(3) of the standard model. The generalized spin connection in C-space has the properties of Yang-Mills gauge fields. It contains the ordinary spin connection related to gravity (with torsion), and extra parts describing additional interactions, including those described by the antisymmetric Kalb-Ramond fields.