Abstract
In these lectures we focus attention on the use of simple explicit canonical transformations to analyze typical Hamiltonians that occur in nonrelativistic physics. In its broadest aspects transformation theory and the “diagonalizing” of Hamiltonians include essentially all of quantum theory. It is therefore not possible to avoid repeating material presented in modern texts on quantum theory. We limit our discussion by ignoring for the most part those unitary transformations that are generated by operators that are exact constants of the motion. The constants of the motion permit one to classify the multiplets corresponding to a given Hamiltonian. The study of the implications of the exact invariance of Hamiltonians under groups of transformations belongs to the subject of standard group theory as applied to quantum mechanics and numerous presentations exist.
Work supported by U.S. Air Force, Office of Scientific Research.
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Gross, E.P. (1968). Transformation Theory. In: Clark, R.C., Derrick, G.H. (eds) Mathematical Methods in Solid State and Superfluid Theory. Mathematical Methods in Solid State and Superfluid Theory. Springer, Boston, MA. https://doi.org/10.1007/978-1-4899-6435-9_2
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