Exploring 3P0 Superfluid in Dilute Spin-Polarized Neutron Matter
Abstract
We explore the theoretical possibility of 3P0 neutron superfluid in dilute spin-polarized neutron matter, which may be relevant to the crust region of a magnetized neutron star. In such a dilute regime where the neutron Fermi energy is less than 1 MeV, the 1S0 neutron superfluid can be suppressed by a strong magnetic field of the compact star. In the low-energy limit relevant for dilute neutron matter, the 3P0 interaction is stronger than the 3P2 one which is believed to induce the triplet superfluid in the core. We present the ground-state phase diagram of dilute neutron matter with respect to the magnetic field and numerically estimate the critical temperature of the 3P0 neutron superfluid, which is found to exceed 107 K.
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