AB INITIO calculations for helium-4 of thermodynamic and transport properties of the gas and the ground state energy of the liquid

A potential energy curve for the 4He diatom obtained from a perturbation theory solution of the Schrödinger equation is used to calculate the viscosity, thermal conductivity, self-diffusion coefficient, and second virial coefficient of gaseous 4He. In addition, the ground state energy of the zero-temperature liquid is obtained by a variation procedure using a trial wavefunction in conjunction with the Monte Carlo method. The results are in good agreement with experiment.