Tensor network formulation of the massless Schwinger model with staggered fermions

@article{Butt2019TensorNF,
  title={Tensor network formulation of the massless Schwinger model with staggered fermions},
  author={Nouman Butt and Simon Catterall and Yannick Meurice and Ryo Sakai and Judah Unmuth-Yockey},
  journal={Physical Review D},
  year={2019},
  volume={101},
  pages={094509}
}
We construct a tensor network representation of the partition function for the massless Schwinger model on a two dimensional lattice using staggered fermions. The tensor network representation allows us to include a topological term. Using a particular implementation of the tensor renormalization group (HOTRG) we calculate the phase diagram of the theory. For a range of values of the coupling to the topological term $\theta$ and the gauge coupling $\beta$ we compare with results from hybrid… 

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