On Wigner's theorem
Mathematical Physics
2012-08-01 v3 Mesoscale and Nanoscale Physics
High Energy Physics - Theory
math.MP
Abstract
Wigner's theorem asserts that any symmetry of a quantum system is unitary or antiunitary. In this short note we give two proofs based on the geometry of the Fubini-Study metric.
Keywords
Cite
@article{arxiv.1112.2133,
title = {On Wigner's theorem},
author = {Daniel S. Freed},
journal= {arXiv preprint arXiv:1112.2133},
year = {2012}
}
Comments
5 pages; small changes in v2; final small changes for publication in v3