A geometrical derivation of the Dirac equation
High Energy Physics - Theory
2009-11-07 v2 General Relativity and Quantum Cosmology
High Energy Physics - Phenomenology
Quantum Physics
Abstract
We give a geometrical derivation of the Dirac equation by considering a spin-1/2 particle travelling with the speed of light in a cubic spacetime lattice. The mass of the particle acts to flip the multi-component wavefunction at the lattice sites. Starting with a difference equation for the case of one spatial and one time dimensions, we generalize the approach to higher dimensions. Interactions with external electromagnetic and gravitational fields are also considered. One logical interpretation is that only at the lattice sites is the spin-1/2 particle aware of its mass and the presence of external fields.
Cite
@article{arxiv.hep-th/0211002,
title = {A geometrical derivation of the Dirac equation},
author = {Y. Jack Ng and H. van Dam},
journal= {arXiv preprint arXiv:hep-th/0211002},
year = {2009}
}
Comments
9 pages, LaTeX, version accepted for publication in Phys. Lett. A