The methods of statistical mechanics are used to evaluate sums of many-vertex Feynman graphs in a simple quantum-field-theory model.
DOI:https://doi.org/10.1103/PhysRevLett.37.117
©1976 American Physical Society
Carl M. Bender*
Tai Tsun Wu†
Vol. 37, Iss. 3 — 19 July 1976
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