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arXiv 1012.0723hep-lat
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SU(3)(2+1)d空间的解围(由扭曲边界条件和自对偶性得到)

SU(3) Deconfinement in (2+1)d from Twisted Boundary Conditions and Self-Duality

Nils Strodthoff, Sam R. Edwards, Lorenz von Smekal

摘要:

我们研究了格点上2+1维纯SU(3)规范理论,利用T Hooft的扭曲边界条件强迫非零中心通量通过有限体积。用这种方法,我们测量类空中心涡的自由能作为解除禁闭跃迁的序参量。在2d三态Potts模型的普适类中,跃迁是二阶的,是自对偶的.这种自对偶性可以在SU(3)规范理论中直接观察到,并且可以利用它在相当小的体积内以高精度提取临界耦合。此外,我们得到了估计的临界指数和临界温度在单位的维数连续耦合。最后,我们还将我们的方法应用到(2+1)d SU(4)规范理论中,该理论以前被发现具有弱的一阶跃迁。然而,我们观察到至少近似q = 4波茨缩放对应于我们的模拟中使用的晶格尺寸的长度尺度。

英文摘要:

We study the pure SU(3) gauge theory in 2+1 dimensions on the lattice using 't Hooft's twisted boundary conditions to force non-vanishing center flux through the finite volume. In this way we measure the free energy of spacelike center vortices as an order parameter for the deconfinement transition. The transition is of 2nd order in the universality class of the 2d 3-state Potts model, which is self-dual. This self-duality can be observed directly in the SU(3) gauge theory, and it can be exploited to extract critical couplings with high precision in rather small volumes. We furthermore obtain estimates for critical exponents and the critical temperature in units of the dimensionful continuum coupling. Finally, we also apply our methods to the (2+1)d SU(4) gauge theory which was previously found to have a weak 1st order transition. We nevertheless observe at least approximate q = 4 Potts scaling at length scales corresponding to the lattice sizes used in our simulations.

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