PoS - Proceedings of Science
Volume 334 - The 36th Annual International Symposium on Lattice Field Theory (LATTICE2018) - Theoretical Developments
Tensor network study of two dimensional lattice $\phi^{4}$ theory
R. Sakai*, D. Kadoh, Y. Kuramashi, Y. Nakamura, S. Takeda and Y. Yoshimura
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Published on: May 29, 2019
The tensor renormalization group attracts great attention as a new numerical method that is free of the sign problem. In addition to this striking feature, it also has an attractive aspect as a coarse-graining of space-time; the computational cost scales logarithmically with the space-time volume. This fact allows us to aggressively approach the thermodynamic limit. While taking this advantage, we study the critical coupling of the two dimensional $\phi^{4}$ theory on large and fine lattices. We present the numerical results along with the extrapolation procedure to the continuum limit and compare them with the previous ones by Monte Carlo simulations.
DOI: https://doi.org/10.22323/1.334.0232
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