Quantum Extremism: Effective Potential and Extremal Paths
Autor: | Argyres, E. N., van Kessel, M. T. M., Kleiss, R. H. P. |
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Rok vydání: | 2009 |
Předmět: | |
Zdroj: | Eur.Phys.J.C65:303-310,2010 |
Druh dokumentu: | Working Paper |
DOI: | 10.1140/epjc/s10052-009-1179-8 |
Popis: | The reality and convexity of the effective potential in quantum field theories has been studied extensively in the context of Euclidean space-time. It has been shown that canonical and path-integral approaches may yield different results, thus resolving the `convexity problem'. We discuss the transferral of these treatments to Minkowskian space-time, which also necessitates a careful discussion of precisely which field configurations give the dominant contributions to the path integral. In particular, we study the effective potential for the N=1 linear sigma model. Comment: 11 pages, 4 figures |
Databáze: | arXiv |
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