Representations of the discrete inhomogeneous Lorentz group and Dirac wave equation on the lattice

Abstract

We propose the fundamental and two dimensional representation of the Lorentz groups on a (3+1)-dimensional hypercubic lattice, from which representations of higher dimensions can be constructed. For the unitary representation of the discrete translation group we use the kernel of the Fourier transform. From the Dirac representation of the Lorentz group (including reflections) we derive in a natural way the wave equation on the lattice for spin 1/2 particles. Finally the induced representation of the discrete inhomogeneous Lorentz group is constructed by standard methods and its connection with the continuous case is discussed.

arXiv commentLaTeX, 20 pages, 1 eps figure, uses iopconf.sty (late submission)

References in corpus (2)

• Quantization of Point Particles in 2+1 Dimensional Gravity and Space-Time Discreteness
• Supersymmetric gauge theories on the lattice

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