# How to observe the future?

by Count Iblis
Tags: future, observe
 P: 2,158 If A is the observable corresponding to observing the lottery draw, how can I measure the operator $$A\left(t\right)=\exp\left(i H t/\hbar\right)A\exp\left(-i H t/\hbar\right)$$ And how to make sure that I can act on the observation of next week lottery draw by submitting the correct numbers without perturbing the wavefunction of the universe so much that it won't evolve to the desired state?