Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1999-02-06
Nucl.Phys. A657 (1999) 187-215
Physics
Nuclear Physics
Nuclear Theory
correted version, appendix on numerical methods added
Scientific paper
10.1016/S0375-9474(99)00325-5
We present a method to calculate nuclear matter properties in the superfluid phase. The method is based on the use of self-consistent off-shell nucleon propagators in the T-matrix equation. Such a complete treatment of the spectral function, is required below and around $T_c$ due to a pseudogap formation in the spectral function. In the superfluid phase we introduce the anomalous self-energy in the fermion propagators and in the T-matrix equation, consistently with the strong coupling BCS equations. The equations for the nucleon spectral function include both a contribution of condensed and scattering pairs. The method is illustrated by numerical calculations. Above $T_c$ pseudogap formation is visible in the spectral function and below $T_c$ a superfluid gap also appears.
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