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arXiv 2202.09142hep-phhep-thnucl-th
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由欧氏热关联函数得到的实时观测量

Real-time observables from Euclidean thermal correlation functions

Peter Lowdon, Ralf-Arno Tripolt

摘要:

在这项工作中,我们应用局域量子场论的方法,以分析实时观测和欧几里得热关联函数之间的连接。特别是,使用从夸克-介子模型中的功能重整化群生成的数据,我们证明了介质中的影响可以直接从欧几里得传播子的空间动量依赖性中提取,与传统的方法相反,传统的方法依赖于从不同的松原频率重建。作为应用,我们确定的解析功能所产生的离散光谱贡献的π关联函数,并计算非微扰剪切粘度从这些状态。

英文摘要:

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.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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