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Critical slowing down and error analysis in lattice QCD simulations

机译:晶格QCD模拟中的严重减速和误差分析

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We study the critical slowing down towards the continuum limit of lattice QCD simulations with Hybrid Monte Carlo type algorithms. In particular for the squared topological charge we find it to be very severe with an effective dynamical critical exponent of about 5 in pure gauge theory. We also consider Wilson loops which we can demonstrate to decouple from the modes which slow down the topological charge. Quenched observables are studied and a comparison to simulations of full QCD is made. In order to deal with the slow modes in the simulation, we propose a method to incorporate the information from slow observables into the error analysis of physical observables and arrive at safer error estimates.
机译:我们使用混合蒙特卡洛类型算法研究了向晶格QCD模拟的连续极限的临界减慢。特别是对于平方拓扑电荷,我们发现它非常严格,在纯规范理论中,有效的动态临界指数约为5。我们还考虑了威尔逊环,我们可以证明它与减慢拓扑电荷的模式脱钩。研究了淬灭的可观测量,并与完整QCD的模拟进行了比较。为了在仿真中处理慢速模式,我们提出了一种将慢速可观测信息纳入物理可观测误差分析并获得更安全误差估计的方法。

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