Not necessary but sufficient condition for the positivity of generalized Wigner functions
- 1 October 1985
- journal article
- Published by AIP Publishing in Journal of Mathematical Physics
- Vol. 26 (10) , 2554-2555
- https://doi.org/10.1063/1.526772
Abstract
Many authors, both in quantum mechanics and signal theory, are concerned with a condition of positivity for the generalized Wigner functions. They give (and use) as necessary and sufficient the condition that the kernel be the characteristic function of another Wigner function. It is shown that the condition is not necessary, but only sufficient.Keywords
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