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I thought this lecture was lost but I found it!
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Review of indications and case review
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Review of technique, main indications and anatomy
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Wigner-Eckart theorem. Note: I previously thought I had lost the recording for PHYSICS739_AngularMomentum6, but I think I found it (it is on macvideo)
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Started studying the addition of angular momentum using the lowering operator method. Introduced direct sums and direct products of Hilbert spaces for the coupled and uncoupled bases, respectively.
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Completed Euler angles, started considering rotation operators for general values of j.
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Group theory of rotations: SO(3) versus SU(2). Started Euler angles.
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Finished slides on "What is a spin?"
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Showed how to find transition amplitudes from the Dyson series. Began analyzing 1st order perturbations constant in time except for being switched on at t=t0.
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Introduced the interaction picture
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Started perturbation theory. Gave example of quadratic Stark shift of ground state.
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Mixed states and the density operator. Taught by Wyatt Kirkby in 2021
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