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Hudson's theorem fails for the SU(1,1) discrete series

Kam, Chon-Fai
arXiv (All) · Papers
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quantum-physics
Hudson's theorem states that a pure state of a bosonic mode has a non-negative Wigner function if and only if it is Gaussian. It underwrites the reading of Wigner negativity as a faithful signature of pure-state non-classicality. We show the statement has no analogue on curved phase space. For the p
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