More about the Grassmann tensor renormalization group

Abstract

We derive a general formula of the tensor network representation for $d$-dimensional lattice fermions with ultra-local interactions, including Wilson fermions, staggered fermions, and domain-wall fermions. The Grassmann tensor is concretely defined with auxiliary Grassmann variables that play a role in bond degrees of freedom. Compared to previous works, our formula does not refer to the details of lattice fermions and is derived by using the singular value decomposition for the given Dirac matrix without any ad-hoc treatment for each fermion. We numerically test our formula for free Wilson and staggered fermions and find that it properly works for them. We also find that Wilson fermions show better performance than staggered fermions in the tensor renormalization group approach, unlike the Monte Carlo method.

arXiv comment16 pages, 9 figures

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Cited by in corpus (6)

• Tensor renormalization group and the volume independence in 2D U($N$) and SU($N$) gauge theories
• Toward tensor renormalization group study of three-dimensional non-Abelian gauge theory
• Quantum Field Theories with Tensor Renormalization Group
• A Practical Introduction to Tensor Network Renormalization with TNRKit.jl
• Tensor network approach to 2D Yang-Mills theories
• Metal-insulator transition in (2+1)-dimensional Hubbard model with tensor renormalization group