Critical behavior of the two-dimensional icosahedron model

Abstract

In the context of a discrete analogue of the classical Heisenberg model, we investigate critical behavior of the icosahedron model, where the interaction energy is defined as the inner product of neighboring vector spins of unit length pointing to vertices of the icosahedron. Effective correlation length and magnetization of the model are calculated by means of the corner-transfer matrix renormalization group (CTMRG) method. Scaling analysis with respect to the cutoff dimension $m$ in CTMRG reveals the second-order phase transition characterized by the exponents $\nu =1.62\pm 0.02$ and $\beta =0.12\pm 0.01$. We also extract the central charge from the classical analogue of the entanglement entropy as $c=1.90\pm 0.02$, which cannot be explained by the minimal series of conformal field theory.

6 pages, 5 figures

References in corpus (5)

• Entanglement spectrum in one-dimensional systems
• Scaling of entanglement support for Matrix Product States
• Matrix product states for critical spin chains: finite size scaling versus finite entanglement scaling
• Symmetry breaking and criticality in tensor-product states
• Study of spin models with polyhedral symmetry on square lattice

Cited by in corpus (4)

• Developments in the Tensor Network -- from Statistical Mechanics to Quantum Entanglement
• Finite-size and finite bond dimension effects of tensor network renormalization
• Tensor Network Based Finite-Size Scaling for Two-Dimensional Classical Models
• Phase diagram of the single-flavor Gross--Neveu--Wilson model from the Grassmann corner transfer matrix renormalization group