Speaker
Description
In this talk we report the progress of our studies on the temporal correlation functions under gradient flow from lattice QCD. The operators to construct the correlation functions under consideration include the energy-momentum tensor and color-electric field. These calculations are the first step in our long-term project of estimating some important quantities: shear&bulk viscosities and heavy quark momentum diffusion coefficient as they could be obtained from the spectral functions extracted from the corresponding correlation functions. In our calculations the gradient flow technique is applied to improve the signal in measuring the correlation functions. We will study the effect of the gradient flow on the small distance part of the correlators in comparison to perturbative estimates and the improvement of the signal at large distances.
