A new variational wave function with backflow correlations for frustrated Hubbard models
نویسنده
چکیده
Contents Introduction iii Overview ix 1 Mott insulators and Spin liquids 1 1.
منابع مشابه
Backflow correlations for the electron gas and metallic hydrogen.
We justify and evaluate backflow three-body wave functions for a two-component system of electrons and protons. Based on the generalized Feynman-Kacs formula, many-body perturbation theory, and band structure calculations, we analyze the use and the analytical form of the backflow function from different points of view. The resulting wave functions are used in variational and diffusion Monte Ca...
متن کاملTransient-estimate Monte Carlo in the two-dimensional electron gas.
Energies of the ground state and low-lying excited states of the two-dimensional electron gas have been calculated by a transient-estimate Monte Carlo method. This is an exact fermion quantum Monte Carlo method that systematically improves upon the results of a variational energy without imposing nodal constraints. We focus upon the density rs51, where our previous variational Monte Carlo calcu...
متن کاملQuantum Monte Carlo study of the Ne atom and the Ne+ ion.
We report all-electron and pseudopotential calculations of the ground-state energies of the neutral Ne atom and the Ne(+) ion using the variational and diffusion quantum Monte Carlo (DMC) methods. We investigate different levels of Slater-Jastrow trial wave function: (i) using Hartree-Fock orbitals, (ii) using orbitals optimized within a Monte Carlo procedure in the presence of a Jastrow factor...
متن کاملEffects of Backflow Correlation in the Three-Dimensional Electron Gas: Quantum Monte Carlo Study
The correlation energy of the homogeneous three-dimensional interacting electron gas is calculated using the variational and fixed-node diffusion Monte Carlo methods, with trial functions that include backflow and three-body correlations. In the high density regime (rs ≤ 5) the effects of backflow dominate over those due to three-body correlations, but the relative importance of the latter incr...
متن کاملNovel Charge Order and Superconductivity in Two-Dimensional Frustrated Lattice at Quarter Filling
Motivated by the various physical properties observed in θ-(BEDT-TTF)2X, we study the ground state of extended Hubbard model on two-dimensional anisotropic triangular lattice at 1/4-filling with variational Monte Carlo method. It is shown that the nearest-neighbor Coulomb interaction enhances the charge fluctuation and it induces the anomalous state such as charge-ordered metallic state and the...
متن کامل