AN EXTENDED VARIATIONAL JASTROW THEORY FOR A 2-DIMENSIONAL HE-3-HE-4 MIXTURE

Using a variational Jastrow wavefunction extended to a three-body corr elation function, a hypernetted chain, and a Fermi hypernetted chain s cheme with the contributions of elementary diagrams, we have investiga ted the ground-state properties, such as the energy per particle and t he structural properties, of a two-dimensional He-3-He-4 mixture. We h ave shown that the ground-state energies increase as a function of the impurity concentration. We have also evaluated the shifts of the ener gies coming from statistics in comparison with boson He-3-He-4 mixture s.