Ehrenfest Theorem

#Physics
States that the expected value of quantum measurements approach classical predictions. A specific case of the generalized Ehrenfest theorem

$\displaystyle m\frac{ \mathrm{d}{\left\langle{x}\right\rangle}}{ \mathrm{d}t }={\left\langle{p}\right\rangle}$

$\displaystyle \frac{ \mathrm{d}{\left\langle{p}\right\rangle} }{ \mathrm{d}t }=-\nabla U$