Nonperturbative approach to a simple model with ultraviolet divergent eigenenergies in perturbation theory
Wen-ge Wang
Abstract
We study a simple model for which perturbation theory gives ultravioletly divergent results. We show that when the eigen-solution problem of the Hamiltonian of the model is treated nonperturbatively, it is possible for eigenenergies of the Hamiltonian to be finite.
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