Short-range correlations in nuclear matter using Green's functions within a discrete pole approximation

We treat short-range correlations in nuclear matter, induced by the repulsi ve core of the nucleon-nucleon potential, within the framework of self-cons istent Green's function theory. The effective in-medium interaction sums th e ladder diagrams of both the particle-particle and hole-hole type. The dem and of self-consistency results in a set of nonlinear equations which must be solved by iteration. We explore the possibility of approximating the sin gle-particle Green's function by a limited number of poles and residues. (C ) 2001 Elsevier Science B.V. All rights reserved.