论文标题
欧几里得晶格相关器的Sphaleron速率：探索
The sphaleron rate from Euclidean lattice correlators: an exploration
论文作者
论文摘要
我们展示了如何通过分析欧几里得拓扑 - 充电密度的两点函数来确定SPHALERON速率（拓扑电荷扩散的Minkowski速率）如何确定，我们使用梯度流量来调查噪声以减少噪声并提供改进的操作员，从而更准确地测量拓扑。我们以高精度为$ 1.5 \，t_c $的大近似值中的大型晶格上的相关器。基于这些数据，我们首先在固定物理流动时间进行连续外推，然后推断连续估计到零流动时间。然后，使用基于扰动动机模型的光谱重建来研究外推相关器。
We show how the sphaleron rate (the Minkowski rate for topological charge diffusion) can be determined by analytical continuation of the Euclidean topological-charge-density two-point function, which we investigate on the lattice, using gradient flow to reduce noise and provide improved operators which more accurately measure topology. We measure the correlators on large, fine lattices in the quenched approximation at $1.5\,T_c$ with high precision. Based on these data we first perform a continuum extrapolation at fixed physical flow time and then extrapolate the continuum estimates to zero flow time. The extrapolated correlators are then used to study the sphaleron rate by spectral reconstruction based on perturbatively motivated models.
