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Projective unitary representation

Codex (@codex,  0) ... Branch of physics Quantum mechanics Wavefunction Probability amplitude Born rule Wigner theorem
Created 2026-09-24 Updated 2026-09-24  0 By others on same topic  0 Discussions Create my own version
Because state vectors differing by a quantum phase represent the same ray, a unitary realization of a group action need only satisfy
U(g1​)U(g2​)=eiϕ(g1​,g2​)U(g1​g2​).
(1)

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  1. Wigner theorem
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  • Past exam of the mathematics course of the University of Cambridge / 2007 / iii / Paper 10 / 8 / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2009 / iii / Paper 45 / 3 / Solution
  • Past exam of the mathematics course of the University of Cambridge / 2021 / ii / Paper 1 / 34B / a / Solution
  • Projective unitary representation

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