A Modern Approach to Quantum Mechanics · Problem 11.8

Identical Particles — John S. Townsend

Physics — Quantum Mechanics · selection-rules-matrix-elements

Problem

Use the form of the

Y_{l,m}(\theta,\phi)

's to verify that

\langle n, l', m'|\hat{z}|n, l, m\rangle = 0

for

m \neq m'