Uploaded July 2022 | Updated September 2026, 2 hours ago

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In this video, I do an interesting time dependent perturbation theory problem, that makes use of the Wigner-Eckart theorem. I consider the problem in the context of experimentally testing physical theory.

My Quantum Mechanics Lecture Series:
youtube.com/playlist?list=PLSpklniGdSfSsAFCzO-YWGlJ4TNv8sMdy

Note: It appears that I forgot to explicitly enter q=0 in the first selection rule, in the second line after the Wigner-Eckart theorem.