Calculation of fermionic Green functions with Grassmann higher-order tensor renormalization group

Understand

We develop calculational method for fermionic Green functions in the framework of Grassmann higher-order tensor renormalization group.

• The validity of the method is tested by applying it to three-dimensional free Wilson fermion system.
• We compare the numerical results for chiral condensate and two-point correlation functions with the exact ones obtained by analytical methods.