Transition from BCS pairing to Bose-Einstein condensation in low-density asymmetric nuclear matter
Transition from BCS pairing to Bose-Einstein condensation in low-density asymmetric nuclear matter
We study the isospin-singlet neutron-proton pairing in bulk nuclear matter as a function of density and isospin asymmetry within the BCS formalism. In the high-density, weak-coupling regime the neutron-proton paired state is strongly suppressed by a minor neutron excess. As the system is diluted, the BCS state with large, overlapping …