Typicality-Based Variational Cluster Approach to Thermodynamic Properties of the Hubbard Model
arXiv:1909.09335 · doi:10.7566/JPSJ.89.023702
Abstract
We develop the variational-cluster-approximation method based on the thermal-pure-quantum-state approach and apply the method to the calculations of the thermodynamic properties of the Hubbard model, thereby obtaining the temperature dependence of the single-particle excitation spectra, entropy and specific heat, and order parameter of the antiferromagnetic phase efficiently. We thus demonstrate that the method developed here has a potential power for elucidating finite-temperature properties of strongly correlated electron systems.
5 pages, 4 figures