The ground-state energies of three-body Coulomb systems calculated by the short-time Green function Monte Carlo method

Abstract

The short-time Green function Monte Carlo method is used to calculate the ground-state energies of the three-body systems e^–₂ e⁺, e^–₂µ⁺, H^–(e^–₂ p⁺) and H^–(∞). In each case high accuracy is attained by employing a carefully optimised trial wavefunction and by using an extrapolation technique to correct for the short-time approximation.