Generalized local-density approximation and one-dimensional finite uniform electron gases

Abstract

We explicitly build a generalized local-density approximation (GLDA) correlation functional based on one-dimensional (1D) uniform electron gases (UEGs). The fundamental parameters of the GLDA \textemdash a generalization of the widely-known local-density approximation (LDA) used in density-functional theory (DFT) \textemdash are the electronic density $\rho$ and a newly-defined two-electron local parameter called the hole curvature $\eta$. The UEGs considered in this study are finite versions of the conventional infinite homogeneous electron gas and consist of $n$ electrons on a infinitely thin wire with periodic boundary conditions. We perform a comprehensive study of these finite UEGs at high, intermediate and low densities using perturbation theory and quantum Monte Carlo calculations. We show that the present GLDA functional yields accurate estimates of the correlation energy for both weakly and strongly correlated one-dimensional systems and can be easily generalized to higher-dimensional systems.

18 pages, 1 figure

References in corpus (12)

• Continuum variational and diffusion quantum Monte Carlo calculations
• Inhomogeneous backflow transformations in quantum Monte Carlo calculations
• Finite-size correction in many-body electronic structure calculations
• Strong correlation in Kohn-Sham density functional theory
• Two electrons on a hypersphere: a quasi-exactly solvable model
• Structure of fermion nodes and nodal cells
• Ground-state energy of the electron liquid in ultrathin wires
• Ground state properties of the one-dimensional electron liquid
• Correlation effects in quasi one dimensional electron wires
• Uniform electron gases
• Correlation energy of the spin-polarized uniform electron gas at high density
• Uniform Electron Gases. II. The Generalized Local Density Approximation in One Dimension

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