The entropy of a correlated system of nucleons

Realistic nucleon-nucleon interactions induce correlations to the nuclear many-body system which lead to a fragmentation of the single-particle strength over a wide range of energies and momenta. We address the question of how this fragmentation affects the thermodynamical properties of nuclear matter. We show that the entropy can be computed with the help of a spectral function which can be evaluated in terms of the self-energy obtained in a Self-Consistent Green's Function approach. The calculations performed are seen to be thermodynamically consistent.