When is the wigner quasi-probability density non-negative?
Abstract
It is shown that a necessary and sufficient condition for the Wigner quasi-probability density to be a true density is that the corresponding Schrödinger state function be the exponential of a quadratic polynomial.
- Publication:
-
Reports on Mathematical Physics
- Pub Date:
- October 1974
- DOI:
- 10.1016/0034-4877(74)90007-X
- Bibcode:
- 1974RpMP....6..249H