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Optimized Expansion for the Effective Action and Multi-particle States in the Scalar Quantum Field Theory

✍ Scribed by A. Okopinska

Publisher: Elsevier Science
Year: 1993
Tongue: English
Weight: 768 KB
Volume: 228
Category: Article
ISSN: 0003-4916
DOI: 10.1006/aphy.1993.1086

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✦ Synopsis

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 ground state energy and lowest excitations obtained in the optimized expansion are compared with the results of (1 / N) expansion and the exact spectrum of the anharmonic oscillator. ' 1993 Academic Press. Inc

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