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On Wigner's theorem (1112.2133v3)
Published 9 Dec 2011 in math-ph, cond-mat.mes-hall, hep-th, and 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.
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