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## Homework Statement

I am calculating [tex]p_{nm} = <\psi_n|p|\psi_m>[/tex] where [tex]\psi_n = \sqrt{2/a}\sin(n\pi x/2)[/tex]. This is for the infinite square well from 0 to a.

I think I am messing up: I get that p_{nm} = 0 when n,m are both odd, even and something nonzero otherwise.

If I am not messing up I have some follow-up questions, but does anyone else get different results?

EDIT: the wavefunction should be [tex]\psi_n = \sqrt{2/a}\sin(n\pi x/a)[/tex]

## Homework Equations

## The Attempt at a Solution

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