Look at it again with that understanding in your head: https://en.wikipedia.org/w/index.php?title=Special:MathWikib...
H acting on a state gives you the time translation of the state. That's the crux of it.
Look at it again with that understanding in your head: https://en.wikipedia.org/w/index.php?title=Special:MathWikib...
H acting on a state gives you the time translation of the state. That's the crux of it.