标题： SU(2)禁闭-去禁闭相变的有效作用 显示英文标题

标题： Effective Actions for the SU(2) Confinement-Deconfinement Phase Transition

摘要： 我们比较了不同的Polyakov环作用量，这些作用量在格点上能有效描述有限温度的SU(2)杨-米尔斯理论。 这些作用量受到同时满足中心对称性的强耦合与特征展开的启发，包括Ising模型和Ginzburg-Landau型模型。 为了简化问题，我们仅考虑最近邻相互作用。 通过一种新的平均场近似方法，研究了一些涉及最相关特征的截断情况。 利用基于精确几何Schwinger-Dyson方程的反Monte Carlo技术，我们确定了Polyakov环作用量的有效耦合。 对这些作用量的Monte Carlo模拟显示，平均场分析很好地指导了所涉及的物理。 我们的Polyakov环作用量在最近邻近似引起的限制范围内，很好地再现了标准杨-米尔斯可观测量。 显示英文摘要

摘要： We compare different Polyakov loop actions yielding effective descriptions of finite-temperature SU(2) Yang-Mills theory on the lattice. The actions are motivated by a simultaneous strong-coupling and character expansion obeying center symmetry and include both Ising and Ginzburg-Landau type models. To keep things simple we limit ourselves to nearest-neighbor interactions. Some truncations involving the most relevant characters are studied within a novel mean-field approximation. Using inverse Monte-Carlo techniques based on exact geometrical Schwinger-Dyson equations we determine the effective couplings of the Polyakov loop actions. Monte-Carlo simulations of these actions reveal that the mean-field analysis is a fairly good guide to the physics involved. Our Polyakov loop actions reproduce standard Yang-Mills observables well up to limitations due to the nearest-neighbor approximation.