Speaker
Description
The tensor renormalization group (TRG) is a numerical method that is, in principle, free from the sign problem and is regarded as a promising candidate for first-principles calculations of finite-density QCD. While many successful studies have been carried out for scalar and fermionic field theories, its application to gauge theories remains under development. In this talk, we propose a method for computing correlators of Wilson loops based on the impurity approach, which is applicable to arbitrary gauge groups in arbitrary dimensions. The method can also be extended to cases with complex coupling constants. As a concrete example, we compute correlators of plaquettes in three-dimensional pure Yang–Mills theory using this approach and compare the results with those obtained from Monte Carlo simulations.