Critical line of the triangular Ising antiferromagnet in a field from a $C_3$-symmetric corner transfer matrix algorithm

Abstract

The corner transfer matrix renormalization group (CTMRG) algorithm has been extensively used to investigate both classical and quantum two-dimensional (2D) lattice models. The convergence of the algorithm can strongly vary from model to model depending on the underlying geometry and symmetries, and the presence of algebraic correlations. An important factor in the convergence of the algorithm is the lattice symmetry, which can be broken due to the necessity of mapping the problem onto the square lattice. We propose a variant of the CTMRG algorithm, designed for models with $C_3$-symmetry, which we apply to the conceptually simple yet numerically challenging problem of the triangular lattice Ising antiferromagnet in a field, at zero and low temperatures. We study how the finite-temperature three-state Potts critical line in this model approaches the ground-state Kosterlitz-Thouless transition driven by a reduced field ($h/T$). In this particular instance, we show that the $C_3$-symmetric CTMRG leads to much more precise results than both existing results from exact diagonalization of transfer matrices and Monte Carlo.

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• Classical simulation of infinite-size quantum lattice systems in two spatial dimensions
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Cited by in corpus (8)

• An introduction to infinite projected entangled-pair state methods for variational ground state simulations using automatic differentiation
• Corner transfer matrix renormalization group approach in the zoo of Archimedean lattices
• Theory of charge-6e condensed phase in Kagome lattice superconductors
• Symmetry breaking and competing valence bond states in the star lattice Heisenberg antiferromagnet
• Efficient iPEPS Simulation on the Honeycomb Lattice via QR-based CTMRG
• Variational boundary based tensor network renormalization group
• Tensor-Network study of Ising model on infinite hyperbolic dodecahedral lattice
• Simplex Crystal Ground State and Magnetization Plateaus in the Spin-$1/2$ Heisenberg Model on the Ruby Lattice