A Grassmann TRG calculation of the Nf=2 massive Schwinger model finds 2pi-periodic free energy that matches large-mass analytics and suggests finite-beta deviations from the continuum phase structure.
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Grassmann Tensor Renormalization Group for two-flavor massive Schwinger model with a theta term
A Grassmann TRG calculation of the Nf=2 massive Schwinger model finds 2pi-periodic free energy that matches large-mass analytics and suggests finite-beta deviations from the continuum phase structure.