Ground State of Liquid He^{4}
Abstract
The properties of the ground state of liquid He^{4} are studied using a variational wave function of the form Π_{i<j}f(r_{ij}). The LennardJones 126 potential is used with parameters determined from the gas data by deBoer and Michiels. The configuration space integrals are performed by a Monte Carlo technique for 32 and 108 atoms in a cube with periodic boundary conditions. With f(r)=exp[(2.6 År)^{5}], the groundstate energy is found to be 0.78 × 10^{15} ergs/atom, which is 20% above the experimental value. The liquid structure factor and the twoparticle correlation function are in reasonably good agreement with the xray and neutron scattering experiments.
 Publication:

Physical Review
 Pub Date:
 April 1965
 DOI:
 10.1103/PhysRev.138.A442
 Bibcode:
 1965PhRv..138..442M