Optimized Expansion for the Effective Ac
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A. Okopinska
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Article
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1993
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Elsevier Science
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English
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The optimized expansion for the effective action in quantum field theory is discussed to second order. As an example we use the scalar quantum field theory with \(\lambda \phi^{4}\) interaction in one-dimensional space-time, which is equivalent to quantum mechanics of the anharmonic ascillator. The