Perturbative expansion around the Gaussian effective action: The background field method
Geon Hyoung LeeDepartment of Physics and Institute for Mathematical Sciences, Yonsei University, Seoul 120-749, KoreaJae Hyung YeeDepartment of Physics and Institute for Mathematical Sciences, Yonsei University, Seoul 120-749, Korea
1997en
ABI
Annotatsiya
We develop a systematic method of 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 nontrivial correction terms greatly improve the Gaussian approximation.
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