Neutron ^3P_2-Dominant Superfluidity with Two-Dimensional Character under Well-Developed π^0 Condensation

概要

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Coexistent aspect of neutron ^3P_2 superfluidity under the well-developed π^0 condensation in neutron star matter, which has been shown in a previous work, is confirmed in such a framework that two-dimensional character of this pairing correlation realized in the [ALS] (Alternating-Layer-Spin) phase is transparent in every step of calculations. Aligned pairing scheme is naturally introduced as the most important one under the well-developed [ALS] structure, which takes efficiently the attractive effect of spin-orbit force in the ^3P_2 state. Energy gap equation obtained after a suitable Bogoliubov transformation has a simple form reflecting two-dimensional character of the aligned pairing. Numerical calculations by the use of an approximate version of realistic local potentials show that energy gaps of the aligned pairing are smaller by a factor of 2^3 than those of the ^3p_2 pairing realized from the spherical Fermi gas, and the resulting critical temperatures are not so different. Dependences on the interaction, density and the parameters characterizing the [ALS] structure and various additional effects are discussed.
理論物理学刊行会の論文
1980-12-25