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Green function in scattering theory

I'm having a bit of trouble with a step in scattering theory. Context: The Schrödinger equation for a two-body scattering problem can be written as: $$ (E - H_0) |\psi\rangle = V |\psi\rangle. $$ Here,...
Lucas's user avatar
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1 answer
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Would a two-particle pure momentum eigenstate scatter in QED?

Okay, I know a momentum eigenstate is not realizable in practice since it's not normalizable. But say we ignore the normalizability constraint, and just apply the rest of the theory. My question is, ...
Adam Herbst's user avatar
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2 votes
1 answer
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When does the "norm of quasi-eigenvectors" matter in calculations? For which physical results are these even used?

Which physical system in nonrelativistic quantum mechanics is actually described by a model, where the norm of the "position eigenstate" (i.e. the delta distribution as limit of vectors in the Hilbert ...
Nikolaj-K's user avatar
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