The Wigner Kernel of a Particle obtained from the Wigner Kernel of a Spin by Group Theoretical Contraction
arXiv:quant-ph/0011029
Abstract
The Moyal formalism for a particle can be derived from the Moyal formalism for a spin. This is done by contracting the group of rotations to the oscillator group. A new derivation is given for the contraction of the spin Wigner-kernel to the Wigner kernel of a particle.
5 pages, Latex, Proceedings of the XIII International Colloquium on Group Theoretical Methods in Physics, 31 July - 5 August 2000, Dubna, Russia