Phase Diagram of Neutron-Proton Condensate in Asymmetric Nuclear Matter

Abstract

We investigate the phase structure of homogeneous and inhomogeneous neutron-proton condensate in isospin asymmetric nuclear matter. At extremely low nuclear density the condensed matter is in homogeneous phase at any temperature, while in general case it is in Larkin-Ovchinnikov-Fulde -Ferrell phase at low temperature. In comparison with the homogeneous superfluid, the inhomogeneous superfluid can survive at higher nuclear density and higher isospin asymmetry.

Comments: 4 pages, 2 figures, arguments and Fig.2 changed, references added