ello everybody,
how can I calculate the group velocity of a wave package in an infinite square well?
I know only how it can be calculated with a free particle, the derivation of the dispersion relation at the expectation value of the moment.
But in the well, there are only discrete...
Sry but i don't understand this. The exp(ikx) term is part of the approach for the region with low potential energy, why it breaks the symmetry in the other region?
Could the reason be, that only the probability density must be mirror symmetric but not the wavefunction?
sinh^2 is mirror...
Hey!
Why i can't use as approach for the eigenfunctions in the regions of high potential energy for bound states only Acosh(Qx+m) instead of A'cosh(Qx)+B'sinh(Qx), where m is the midpoint of the wall?
If i put the origin of the coordinate system in this midpoint and use the mirror-symmetry...