PIRSA:24050091

Machine Learning Renormalization Group (VIRTUAL)

You, Y. (2024). Machine Learning Renormalization Group (VIRTUAL). Perimeter Institute. https://pirsa.org/24050091

You, Yi-Zhuang. Machine Learning Renormalization Group (VIRTUAL). Perimeter Institute, May. 24, 2024, https://pirsa.org/24050091 

          @misc{ pirsa_PIRSA:24050091,
            doi = {10.48660/24050091},
            url = {https://pirsa.org/24050091},
            author = {You, Yi-Zhuang},
            keywords = {Other},
            language = {en},
            title = {Machine Learning Renormalization Group (VIRTUAL)},
            publisher = {Perimeter Institute},
            year = {2024},
            month = {may},
            note = {PIRSA:24050091 see, \url{https://pirsa.org}}
          }

Yi-Zhuang You

University of California, San Diego

Talk number
PIRSA:24050091
Collection
Talk Type
Subject
Abstract

We develop a Machine-Learning Renormalization Group (MLRG) algorithm to explore and analyze many-body lattice models in statistical physics. Using the representation learning capability of generative modeling, MLRG automatically learns the optimal renormalization group (RG) transformations from self-generated spin configurations and formulates RG equations without human supervision. The algorithm does not focus on simulating any particular lattice model but broadly explores all possible models compatible with the internal and lattice symmetries given the on-site symmetry representation. It can uncover the RG monotone that governs the RG flow, assuming a strong form of the $c$-theorem. This enables several downstream tasks, including unsupervised classification of phases, automatic location of phase transitions or critical points, controlled estimation of critical exponents, and operator scaling dimensions. We demonstrate the MLRG method in two-dimensional lattice models with Ising symmetry and show that the algorithm correctly identifies and characterizes the Ising criticality.

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