1995/09/28 by Yaw-Hwang Chen, Min-Tsung He, Su-Long Nyeo
Physics and Astronomy · #hep-th
published as Chin.J.Phys. 34 (1996) 1129-1135 · 12 pages
arxiv created 1995/09/28 · arxiv updated 2009/11/30
We introduce an approach for calculating the quantum loop corrections in the ϕ4 theory. Differential regularization and background-field method are essential tools and are used to calculate the effective action of the theory to two-loop order. Our approach is considerably simpler than other known methods and can be readily extended to higher-loop calculations and to other models.