Nonlinear quantum field theories at finite temperature in the optimized expansion

Anna Okopińska

Physica A: Statistical Mechanics and its Applications, 1989, vol. 158, issue 1, 64-76

Abstract: The optimized expansion for the path integral representation of the generating functional in quantum field theory is formulated. The first-order effective action is obtained in scalar and fermion field theories with quartic self-interactions. To this approximation the scalar theory is renormalized in the space-time dimension n = 4 and 5, and the fermion theory in n = 2 and 3. Thermal properties of the renormalized theories are studied by means of the finite-temperature effective potential. Both theories appear trivial or precarious

Date: 1989
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:158:y:1989:i:1:p:64-76

DOI: 10.1016/0378-4371(89)90508-6

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