Perturbative expansion around the Gaussian effective action: The background field method
- Department of Physics and Institute for Mathematical Sciences, Yonsei University, Seoul 120-749 (Korea)
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. {copyright} {ital 1997} {ital The American Physical Society}
- OSTI ID:
- 545068
- Journal Information:
- Physical Review, D, Journal Name: Physical Review, D Journal Issue: 10 Vol. 56; ISSN PRVDAQ; ISSN 0556-2821
- Country of Publication:
- United States
- Language:
- English
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