Relativistic spin operator and Dirac equation
Mathematical Physics
2012-06-15 v1 math.MP
Quantum Physics
Abstract
We give a direct link between description of Dirac particles in the abstract framework of unitary representation of the Poincar\'e group and description with the help of the Dirac equation. In this context we discuss in detail the spin operator for a relativistic Dirac particle. We show also that the spin operator used in quantum field theory for spin corresponds to the Foldy-Woutheysen mean-spin operator.
Cite
@article{arxiv.1206.3074,
title = {Relativistic spin operator and Dirac equation},
author = {Paweł Caban and Jakub Rembieliński and Marta Włodarczyk},
journal= {arXiv preprint arXiv:1206.3074},
year = {2012}
}
Comments
10 pages, no figures