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

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

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...

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Veröffentlicht in:arXiv.org 2019-09
Hauptverfasser: Nishida, Hisao, Fujiuchi, Ryo, Sugimoto, Koudai, Ohta, Yukinori
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Sprache:eng
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Antiferromagnetism
Clusters
Excitation spectra
Order parameters
Physics - Strongly Correlated Electrons
Temperature dependence
Thermodynamic properties
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Fujiuchi, Ryo
Sugimoto, Koudai
Ohta, Yukinori
description 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.
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subjects Antiferromagnetism
Clusters
Excitation spectra
Order parameters
Physics - Strongly Correlated Electrons
Temperature dependence
Thermodynamic properties
title Typicality-Based Variational Cluster Approach to Thermodynamic Properties of the Hubbard Model
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