On a Derivation of the Dirac Hamiltonian From a Construction of Quantum Gravity

Details On a Derivation of the Dirac Hamiltonian From a Construction of Quantum Gravity On a Derivation of the Dirac Hamiltonian From a Construction of Quantum Gravity

2010-03-19

arxiv.org/abs/1003.3802v1

Physics

High Energy Physics

High Energy Physics - Theory

13 pages, two figures.

Scientific paper

The structure of the Dirac Hamiltonian in 3+1 dimensions is shown to emerge in a semi-classical approximation from a abstract spectral triple construction. The spectral triple is constructed over an algebra of holonomy loops, corresponding to a configuration space of connections, and encodes information of the kinematics of General Relativity. The emergence of the Dirac Hamiltonian follows from the observation that the algebra of loops comes with a dependency on a choice of base-point. The elimination of this dependency entails spinor fields and, in the semi-classical approximation, the structure of the Dirac Hamiltonian.

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