Dm. Davidovic et D. Lalovic, WHEN DOES A GIVEN FUNCTION IN-PHASE SPACE BELONG TO THE CLASS OF HUSIMI DISTRIBUTIONS, Journal of physics. A, mathematical and general, 26(19), 1993, pp. 5099-5105
The problem of finding a density matrix corresponding to a Husimi dist
ribution is solved in a simple, new way. It is shown how the proposed
procedure may be effectively used to answer the question raised in the
title.