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|Title:||Non-negative Wigner functions for orbital angular momentum states|
Klimov, Andrei B.
|Abstract:||The Wigner function of a pure continuous-variable quantum state is non-negative if and only if the state is Gaussian. Here we show that for the canonical pair angle and angular momentum, the only pure states with non-negative Wigner functions are the eigenstates of the angular momentum. Some implications of this surprising result are discussed. � 2010 The American Physical Society.|
|Appears in Collections:||Producción científica UdeG|
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