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Critical behavior of lattice Schwinger model with topological term at $\theta=\pi$ using Grassmann tensor renormalization group

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arxiv 1408.0897 v1 pith:K74RH4WD submitted 2014-08-05 hep-lat cond-mat.str-elhep-th

Yuya Shimizu , Yoshinobu Kuramashi This is my paper · ORCID
classification hep-latcond-mat.str-elhep-th
keywords orderphasethetazeroanalysescriticalfirstfisher
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abstract

Lattice regularized Schwinger model with a so-called $\theta$ term is studied by using the Grassmann tensor renormalization group. We perform the Lee-Yang and Fisher zero analyses in order to investigate the phase structure at $\theta=\pi$. We find a first order phase transition at larger fermion mass. Both of the Lee-Yang zero and Fisher zero analyses indicate that the critical endpoint at which the first order phase transition terminates belongs to the Ising universality class.

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Cited by 7 Pith papers

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