Wednesday, February 22, 2017

quantum mechanics - Second order degenerate perturbation theory


What is a good resource to learn about higher degree degenerate perturbation theory - one that involves mathematics that isn't much more advanced than first order perturbation theory? I've looked around and I've only found Sakurai talk about it but he uses projections operators and other fancy mathematics. Also, does anyone have any examples of it being used?




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classical mechanics - Moment of a force about a given axis (Torque) - Scalar or vectorial?

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