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标题：'t Hooft loops and perturbation theory
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作者：P. de-Forcrand ; B. Lucini ; D. Noth 等
期刊名称：PoS - Proceedings of Science
印刷版ISSN：1824-8039
出版年度：2005
卷号：2005
出版社：SISSA, Scuola Internazionale Superiore di Studi Avanzati
摘要：We show that high-temperature perturbation theory describes extremely well the area law of SU(N) spatial ’t Hooft loops, or equivalently the tension of the interface between different ZN vacua in the deconfined phase. For SU(2), the disagreement between Monte Carlo data and lattice perturbation theory for s˜ (T)=T2 is less than 2%, down to temperatures O(10) Tc. For SU(N);N > 3, the ratios of interface tensions, (s˜k=s˜1)(T), agree with perturbation theory, which predicts tiny deviations from the ratio of Casimirs, down to nearly Tc. In contrast, individual tensions differ markedly from the perturbative expression. In all cases, the required precision Monte Carlo measurements are made possible by a simple but powerful modification of the ’snake’ algorithm.