Work

Transition from BCS pairing to Bose-Einstein condensation in low-density asymmetric nuclear matter

Year: 2001

Type: article

Abstract: 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 Cooper pairs evolves smoothly into a Bose-Einstein condensate of tightly bound neutron-proton pairs (deuterons). In the resulting low-density system a neutron excess is ineffective in quenching the pair correlations because of the large spatial separation of the deuterons and neutrons. As a result, the Bose-Einstein condensation of deuterons is weakly affected by an additional gas of free neutrons even at very large asymmetries.

Source: Physical Review C

DOI: 10.1103/physrevc.64.064314

Authors: U. Lombardo, P. Nozières, P. Schuck, H.-J. Schulze, A. Sedrakian

Institutions: Istituto Nazionale di Fisica Nucleare, Laboratori Nazionali del Sud, Institut Laue-Langevin, Universitat de Barcelona

Language: English

Topic: Nuclear physics research studies

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Generalitat de Catalunya, Centre National de la Recherche Scientifique, Institut National de Physique Nucléaire et de Physique des Particules

Award: G196419191