Phys. Rev. Lett. 59, 532 - 534 (1987)Operator regularization of Green’s functions |
PRL Celebrates 50 Years
This Week's Milestone Letters are from 1984: |
D. G. C. McKeon and T. N. Sherry
Department of Applied Mathematics, University of Western Ontario, London, Ontario, N6A 5B9 Canada llege Galway, Galway, IrelReceived 21 July 1986)
Operator regularization in background-field quantization facilitates the use of a perturbative expansion due to Schwinger to compute Green’s functions to all orders. The procedure is distinct from the usual Feynman technique. No explicit divergences are encountered. We illustrate with a φ63 theory and discuss applications to QED, supersymmetry, axial models, and quantum gravity.
©1987 The American Physical Society
URL: http://link.aps.org/abstract/PRL/v59/p532
DOI: 10.1103/PhysRevLett.59.532
PACS: 11.10.Ef, 11.10.Gh
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