Tensor Renormalization Group for fermions

• URL: http://arxiv.org/abs/2401.08542v1
• Date: Tue, 16 Jan 2024 18:06:23 GMT
• Title: Tensor Renormalization Group for fermions
• Authors: Shinichiro Akiyama, Yannick Meurice, Ryo Sakai
• Abstract summary: We show how the Renormalization Group method can be applied to lattice field theory models involving relativistic fermions and Grassmann variables in arbitrary dimensions. New methods are tested with two-dimensional Wilson-Majorana fermions and multi-flavor Gross-Nev-eu models.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: We review the basic ideas of the Tensor Renormalization Group method and show how they can be applied for lattice field theory models involving relativistic fermions and Grassmann variables in arbitrary dimensions. We discuss recent progress for entanglement filtering, loop optimization, bond-weighting techniques and matrix product decompositions for Grassmann tensor networks. The new methods are tested with two-dimensional Wilson--Majorana fermions and multi-flavor Gross--Neveu models. We show that the methods can also be applied to the fermionic Hubbard model in 1+1 and 2+1 dimensions.

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