Generalized Ehrenfest Theorem

$\frac{\mathrm{d}⟨\hat{Q}⟩}{\mathrm{d}t}=\frac{i}{\hslash }⟨[\hat{H},\hat{Q}]⟩+⟨\frac{\mathrm{d}\hat{Q}}{\mathrm{d}t}⟩$

• Change in time of a quantum operator is determined on whether it’s compatible with $\hat{H}$