arXiv:1112.2133 · Geometry and topology monographs

On Wigner's theorem

Daniel S. Freed

Published Oct 14, 2012• 20 citations

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.

DOI: 10.2140/gtm.2012.18.83

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