OPTIMIZED POST GAUSSIAN APPROXIMATION IN THE BACKGROUND FIELD METHOD
Abdulla RakhimovInstitute of Physics and Applied Physics, Yonsei University, Seoul, KoreaJae Hyung YeeInstitute of Physics and Applied Physics, Yonsei University, Seoul, Korea
2004en
ABI
Abstract
We have extended the variational perturbative theory based on the background field method to include the optimized expansion of Okopinska and the post Gaussian effective potential of Stansu and Stevenson. This new method provides a much simpler way to compute the correction terms to the Gaussian effective action (or potential). We have also renormalized the effective potential in 3+1 dimensions by introducing appropriate counterterms in the Lagrangian.
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Cited by 70 references