A trial solution constructed from two-body functions is applied to a variational treatment of
the many-body problem with strong forces. The expectation value of the energy for Bose …

A trial solution constructed from two-particle functions is applied to the problem of the N-
particle system with strong interactions. In a variational treatment based on this wave …

The many-body problem has recently been studied by Brueckner and others using a self-
consistent-field approach which includes the effects of two-body correlations. Unlike the …

Variational calculations of the ground-state energy of hard-sphere, helium-4, Coulomb, and
nuclear Yukawa fluids are carried out. The long-range part v (r> d) and a constant part λ at r< …

It is shown that the pseudopotential method can be extended to yield further terms in the low-
density expansion of the ground-state energy of a system of Boltzmann or Bose particles …

A formulation of the energy eigenvalue problem for a many-particle system is presented in
several alternative forms and, following Brueckner and his collaborators, the energy of the …

The system under consideration is an N-particle quantum-mechanical system enclosed in a
volume V, in which the particles interact via two-body hard-sphere potentials, with hard …

Now that the low temperature properties of quantum-mechanical many-body systems
(bosons) at low density, ρ, can be examined experimentally it is appropriate to revisit some …

Under many conditions, short-range interparticle forces may be simulated by hard cores.
The excluded-volume condition which this implies is equivalent to a single restriction upon …

In a previous paper a trial wave function of the form ψ= DII i< if (x ij) was used variationally to
calculate the ground-state energy of an interacting electron gas, D being a determinant of …