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THE EFFECTIVE POTENTIAL FOR COMPOSITE OPERATOR IN THE SCALAR MODEL AT FINITE TEMPERATURE

    https://doi.org/10.1142/9789812799913_0012Cited by:0 (Source: Crossref)
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    Abstract:

    We discuss the φ4 and φ6 theory defined in a flat D-dimensional space-time. Assuming that the system is in equilibrium with a thermal bath at temperature β-1. To obtain a non-perturbative result, the 1/N expansion is used. We use the method of the composite operator (CJT) for summing a large set of Feynman graphs.