Finite temperature λφ4 theory in two and three dimensions and symmetry restoration |
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| Authors: | Y. Fujimoto A. Wipf H. Yoneyama |
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| Affiliation: | 1. Institute for Theoretical Physics, University of Bern, CH-3012, Bern, Switzerland
2. Dublin Institute for Advanced Studies, 10 Burlington Road, Dublin 4, Irland
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| Abstract: | λφ4 Theory is studied in 2 and 3 dimensions to examine the validity of the finite temperature perturbation theory. We find that in some cases it is good even at high temperature in contrast to the case in 4 dimensions. We also discuss the problem of symmetry restoration and show an example of symmetry restoration within a safe perturbation at high temperature. |
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