Typicality-Based Variational Cluster Approach to Thermodynamic Properties of the Hubbard Model

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

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Cited by in corpus (8)

• Entanglement of midspectrum eigenstates of chaotic many-body systems: Reasons for deviation from random ensembles
• Random State Technology
• Thermodynamic properties of an $S=1/2$ ring-exchange model on the triangular lattice
• Doping and temperature evolution of pseudogap and spin-spin correlations in the two-dimensional Hubbard model
• Finite-temperature properties of excitonic condensation in the extended Falicov-Kimball model: Cluster mean-field-theory approach
• Pump-probe spectroscopy of the one-dimensional extended Hubbard model at half filling
• Temperature-driven change in band structure reflecting spin-charge separation of Mott and Kondo insulators
• Emergence and evolution of electronic modes with temperature in spin-gapped Mott and Kondo insulators