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arXiv 1012.0408hep-lat
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解禁闭的普适方面:2+1维中的界面、通量管和自对偶性

Universal Aspects of Deconfinement: Interfaces, Flux Tubes and Self-Duality in 2+1 Dimensions

Lorenz von Smekal, Sam R. Edwards, Nils Strodthoff

摘要:

我们研究了2+1维晶格上的中心涡旋自由能和t Hooft电通量,其中SU(2)是二维伊辛模型的普适类.这使得大量精确的结果触手可及。特别地,SU(2)临界态附近的类空中心涡对应于二维伊辛模型中的自旋界面,而二维伊辛模型的普适标度函数是精确已知的。我们利用这一点,以前所未有的精度定位的退禁闭过渡,随后为有限尺寸标度分析,其中的自对偶性的$2d$自旋模型反映在类空涡旋和限制电通量之间的对偶性。高温阶段弦张力和它的对偶张力之间的对应关系可以说是普适振幅比的最简单的例子。围绕过渡,两者都可以有效地从精确的结果中提取与全球单参数拟合,允许直接连续外推。

英文摘要:

We study center vortex free energies and 't Hooft's electric fluxes on the lattice in 2+1 dimensions, where SU(2) for example, is in the universality class of the 2d Ising model. This places a wealth of exact results at our fingertips. In particular, spacelike center vortices in SU(2) near criticality correspond to spin interfaces in the 2d Ising model, whose universal scaling functions are known exactly. We exploit this to locate the deconfinement transition with unprecedented precision and subsequently for a finite size scaling analysis, where the self-duality of the $2d$ spin model is reflected in a duality between the spacelike vortices and confining electric fluxes. The corresponding relation between the string tension and its dual in the high temperature phase is arguably the simplest example of a universal amplitude ratio. Around the transition, both can be efficiently extracted from the exact results with a global one-parameter fit which allows straightforward continuum extrapolation.

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