Articles

Continuous and Discontinuous Perturbations

Science  17 Feb 1978:
Vol. 199, Issue 4330, pp. 735-740
DOI: 10.1126/science.199.4330.735

Abstract

Perturbations of quantum systems ranging from oscillators to fields can be either continuous or discontinuous functions of the coupling. Even nonrenormalizable fields may now find a natural interpretation.

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