- #1
agooddog
- 3
- 0
Homework Statement
[PLAIN]http://img219.imageshack.us/img219/306/prblem.png
(oops, that line should end with "just before measurement? (Express your answer in terms of the variances of the two operators)" )
The Attempt at a Solution
[PLAIN]http://img641.imageshack.us/img641/5214/answerm.png
Does this make sense? I know that each operator is Hermitian, so it is an observable. I also know that they are incompatible because they do not commute. So the uncertainty principle must hold. However, the wording of the question makes me question myself... it merely gives the system's state directly before the measurement. Does time dependence matter?
Also, I can calculate the deviation of each operator by themselves, and multiply them together to get the same as the other side of the uncertainty inequality. I suppose the question asks for an answer in terms of the variance of the two operators, so perhaps it is not asking me to confirm both sides.
Any insight would be appreciated.
(sorry for the odd format, I'm still learning the ropes at making equations on the computer)
Last edited by a moderator: