论文标题
部分可观测时空混沌系统的无模型预测
Topological susceptibility of $N_f=2+1$ QCD from staggered fermions spectral projectors at high temperatures
论文作者
论文摘要
我们使用在时空晶格上离散的理论的数值模拟，计算出高温阶段的物理夸克质量的$ n_f = 2+1 $ qCD的拓扑敏感性。更确切地说，我们估计五个温度的拓扑敏感性在$ \ sim200 $ MEV到$ \ sim600 $ MEV的范围内，采用了基于交错的狄拉克运营商的拓扑费用的光谱投影仪的定义。事实证明，该策略在减少影响标准gluonic定义的大型晶格伪像有效，从而可以执行可靠的连续性外推。我们发现，在探索温度范围内易感性的结果与文献中先前的确定部分处于紧张状态。
We compute the topological susceptibility of $N_f=2+1$ QCD with physical quark masses in the high-temperature phase, using numerical simulations of the theory discretized on a space-time lattice. More precisely we estimate the topological susceptibility for five temperatures in the range from $\sim200$ MeV up to $\sim600$ MeV, adopting the spectral projectors definition of the topological charge based on the staggered Dirac operator. This strategy turns out to be effective in reducing the large lattice artifacts which affect the standard gluonic definition, making it possible to perform a reliable continuum extrapolation. Our results for the susceptibility in the explored temperature range are found to be partially in tension with previous determinations in the literature.
