# Theoretical quantum mechanics problem

1. Mar 27, 2009

### EliotHijano

1. The problem statement, all variables and given/known data
Demonstrate that <$$\alpha_{1},j_{1},m_{1}|r·p+p·r|\alpha_{2},j_{2},m_{2}>$$ is 0 when $$m_{1}\neq m_{2}$$

2. Relevant equations

3. The attempt at a solution
I have demonstrated that r·p+p·r is equal to $$\frac{i·m}{\hbar}[H,r^{2}]$$

I would appreciate your help. Thank you
1. The problem statement, all variables and given/known data

2. Relevant equations

3. The attempt at a solution