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Tensor renormalization group study of classical XY model on the square lattice
Journal article   Open access   Peer reviewed

Tensor renormalization group study of classical XY model on the square lattice

J. F Yu, Z. Y Xie, Y Meurice, Yuzhi Liu, A Denbleyker, Haiyuan Zou, M. P Qin, J Chen and T Xiang
Physical review. E, Statistical, nonlinear, and soft matter physics, Vol.89(1), 013308
01/2014
DOI: 10.1103/PhysRevE.89.013308
url
https://arxiv.org/pdf/1309.4963View
Open Access

Abstract

Using the tensor renormalization group method based on the higher-order singular value decomposition, we have studied the thermodynamic properties of the continuous XY model on the square lattice. The temperature dependence of the free energy, the internal energy, and the specific heat agree with the Monte Carlo calculations. From the field dependence of the magnetic susceptibility, we find the Kosterlitz-Thouless transition temperature to be 0.8921(19), consistent with the Monte Carlo as well as the high temperature series expansion results. At the transition temperature, the critical exponent δ is estimated as 14.5, close to the analytic value by Kosterlitz.

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