Perturbative Expansion around the Gaussian Effective Action: The Background Field Method
High Energy Physics - Theory
2016-08-25 v3
Abstract
We develop a systematic method of the perturbative expansion around the Gaussian effective action based on the background field method. We show, by applying the method to the quantum mechanical anharmonic oscillator problem, that even the first non-trivial correction terms greatly improve the Gaussian approximation.
Cite
@article{arxiv.hep-th/9707035,
title = {Perturbative Expansion around the Gaussian Effective Action: The Background Field Method},
author = {Geon Hyoung Lee and Jae Hyung Yee},
journal= {arXiv preprint arXiv:hep-th/9707035},
year = {2016}
}
Comments
16 pages, 3 eps figures, uses RevTeX and epsf. Errors in Table 1 are corrected and new references are added