The structure of projection-valued states: A generalization of Wigner's theorem |
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Authors: | Ron Wright |
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Institution: | (1) Department of Mathematics and Statistics, University of Massachusetts, 01003 Amherst, Massachusetts |
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Abstract: | A projection-valued state is defined to be a completely orthoadditive map from the projections on one Hilbert space into the projections on another Hilbert space, which preserves the unit. Any such mapping is shown to have the formP U
1(P 11)U
1
–1
U
2(P 12)U
2
–1
, whereU
1 is unitary andU
2 is antiunitary, generalizing Wigner's theorem on symmetry transformations. A physical interpretation is given and the relation to quantum logic is discussed.The contents of this paper are a portion of the author's dissertation at the University of Massachusetts at Amherst. |
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Keywords: | |
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