标题： Polyakov 循环关联函数中的弦效应 显示英文标题

标题： String effects in Polyakov loop correlators

摘要： 我们将有限温度规范理论中约束的有效字符串描述的预测与三维Z_2规范理论的高精度蒙特卡洛数据进行比较。 首先我们回顾自由玻色弦模型的预测及其在物理感兴趣的各种区域中的渐近行为。 然后我们表明，在温度不太接近解禁闭温度时（通常为T<T_c/3），可以获得与蒙特卡洛数据非常好的一致。 对于更高温度，高阶效应不能忽略：我们表明通过假设Nambu-Goto弦作用量并计算其在次领头阶的配分函数可以准确地对其进行建模。 显示英文摘要

摘要： We compare the predictions of the effective string description of confinement in finite temperature gauge theories to high precision Monte Carlo data for the three-dimensional Z_2 gauge theory. First we review the predictions of the free bosonic string model and their asymptotic behavior in the various regimes of physical interest. Then we show that very good agreement with the Monte Carlo data is obtained, for temperatures not too close to the deconfinement one (typically T<T_c/3). For higher temperatures, higher order effects are not negligible: we show that they are accurately modeled by assuming a Nambu-Goto string action and computing its partition function at next-to-leading order.