:rolleyes: Oh dark side of the force, what are you saying to the little padawan!
Master, I think you have to review the problem :biggrin: .
In the Koopman-von Neumann approach, we have rho(q,p,t)= <psi||q,p><q,p|psi>= |psi(q,p,t)|^2. There is a lot of papers studying this formulation, you...