论文标题
来自欧几里得热相关函数的实时可观察到
Real-time observables from Euclidean thermal correlation functions
论文作者
论文摘要
在这项工作中，我们采用了局部量子场理论方法，以分析实时可观察到和欧几里得热相关函数之间的联系。特别地，使用夸克 - 梅森模型中功能ren义化组产生的数据，我们证明可以直接从欧几里得传播器的空间动量依赖性中直接提取中等内部效应，与常规方法相反，与常规方法相比，这些方法依赖于不同matsubara频率的重构。作为一种应用，我们确定了由离散光谱贡献对锥形相关函数产生的分析特征，并计算出由这些状态产生的非扰动剪切粘度。
In this work we apply a local quantum field theory approach in order to analyse the connection between real-time observables and Euclidean thermal correlation functions. In particular, using data generated from the functional renormalisation group in the quark-meson model, we demonstrate that in-medium effects can be directly extracted from the spatial momentum dependence of the Euclidean propagators, in contrast to conventional approaches, which rely on the reconstruction from different Matsubara frequencies. As an application, we determine the analytic features that arise from the discrete spectral contribution to the pion correlation function, and calculate the non-perturbative shear viscosity arising from these states.
