Tensor network approach to 2D Yang-Mills theories

Abstract

We propose a novel tensor network representation for two-dimensional Yang-Mills theories with arbitrary compact gauge groups. In this method, tensor indices are directly given by group elements with no direct use of the character expansion. We apply the tensor renormalization group method to this tensor network for $SU(2)$ and $SU(3)$, and find that the free energy density and the energy density are accurately evaluated. We also show that the singular value decomposition of a tensor has a group theoretic structure and can be associated with the character expansion.

arXiv comment22 pages, 19 figures

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Cited by in corpus (1)

• Tensor renormalization group and the volume independence in 2D U($N$) and SU($N$) gauge theories