Multiplicity, localization, and domains in the Hartree–Fock ground state of the two-dimensional Hubbard model

  title={Multiplicity, localization, and domains in the Hartree–Fock ground state of the two-dimensional Hubbard model},
  author={Kazue Matsuyama and Jeff Greensite},
  journal={Annals of Physics},


Spin- and charge-density waves in the Hartree-Fock ground state of the two-dimensional Hubbard model.
The UHF solution provides a good description of the magnetic correlations in the true ground state of the Hubbard model for intermediate interactions, and a simple pairing model is presented with analytic calculations for low interaction strength and small doping.
Generalized Hartree-Fock theory and the Hubbard model
The familiar unrestricted Hartree-Fock variational principles is generalized to include quasi-free states. As we show, these are in one-to-one correspondence with the one-particle density matrices
Hartree-Fock study of the magnetism in the single-band Hubbard model.
We study the magnetic phases of the single-band Hubbard model within the self-consistent Hartree-Fock formalism applied to a large supercell. We find that incommensurate spin-density waves gradually
Phase diagram of the two-dimensional disordered Hubbard model in the Hartree-Fock approximation.
  • Dasgupta, Halley
  • Physics, Materials Science
    Physical review. B, Condensed matter
  • 1993
Ground-state properties of the two-dimensional Hubbard model with point-defect disorder are investigated numerically in the Hartree-Fock approximation and the presence of U strongly enhances the localization in the antiferromagnetic phase.
Multireference symmetry-projected variational approaches for ground and excited states of the one-dimensional Hubbard model
We present a multi-reference configuration mixing scheme for describing ground and excited states, with well defined spin and space group symmetry quantum numbers, of the one-dimensional Hubbard
Two-dimensional Hubbard model: Numerical simulation study.
  • Hirsch
  • Physics
    Physical review. B, Condensed matter
  • 1985
The two-dimensional Hubbard model on a square lattice with nearest-neighbor hopping is studied and it is suggested that the system is always paramagnetic, in contradiction with Hartree-Fock predictions.
Holes and magnetic textures in the two-dimensional Hubbard model.
The Hubbard model in a two-dimensional square lattice is studied within the unrestricted Hartree-Fock approximation. It is shown that a large number of self-consistent solutions exist, which
Solutions of the Two-Dimensional Hubbard Model: Benchmarks and Results from a Wide Range of Numerical Algorithms
Numerical results for ground-state and excited-state properties (energies, double occupancies, and Matsubara-axis self-energies) of the single-orbital Hubbard model on a two-dimensional square
Spin Density Wave States in Two Dimensional Hubbard Model
For a wide range of electron filling we study the spin density wave states in the Hubbard model on a square lattice within a Hartree-Fock approximation. It is shown that the incommensurate helical
Quantum Monte Carlo study of the two-dimensional fermion Hubbard model
We report large scale determinant quantum Monte Carlo calculations of the effective bandwidth, momentum distribution, and magnetic correlations of the square lattice fermion Hubbard Hamiltonian at