- #1
aminh
- 7
- 0
Homework Statement
Particle is in a tube with infinitely strong walls at x=-L/2 and x=L/2/ Suppose at t = 0 the electron known not to be in the left half of the tube, but you have no informations about where it might be in the right half---it is equally likely to be anywhere on the right side.
(a) Using this information, determine the initial wave function Psi(x,t=0) for this electron.
(b) If you were to measure the energy of the lectron at t=0, find the probability of getting E_1, the ground state energy for this tube.
Homework Equations
The Attempt at a Solution
Well for part (a) I think I have a solution.
Psi(x,t=0) = Psi(x) = A Sin(n pi x/L)
Then found the normalization constant A...since we know that the electron is initially known to be in the right half of the well A= 2/Sqrt(L)...I think this is right..For part (b) I'm a little confused ... I know that
E_n= (n^2 pi^2 hbar^2) / (2 m L^2) and I think that
Prob(E=E_1) = |<E_1|Psi>|^2 = |<E_1|x|E_n>|^2
Is that right? And what if I want the probability density where t>0...I know I have to just include the term Exp[-iE_n t/ hbar]...but is that it? Please help me ASAP...lol
Last edited: