Strong-coupling effects of pairing fluctuations, and Anderson-Bogoliubov mode in neutron S0 1 superfluids in neutron stars

Daisuke Inotani, Shigehiro Yasui, Muneto Nitta

研究成果: Article査読

2 被引用数 (Scopus)

抄録

We investigate effects of thermal and quantum fluctuations of the superfluid order parameter in S01 superfluids in neutron stars. We construct a separable potential to reproduce the S01 phase shift reconstructed by using the partial wave analysis from nucleon scattering data. We include superfluid fluctuations within a strong-coupling approximation developed by Nozières and Schmitt-Rink and determine self-consistently the superfluid order parameter as well as the chemical potential. We show that the quantum depletion, which gives a fraction of noncondensed neutrons at zero temperature due to quantum pairing fluctuations, plays an important role not only near the critical temperature from superfluid states to normal states but also at zero temperature. We derive the dispersion relation of Anderson-Bogoliubov modes associated with phase fluctuations and show also that there is a nonzero fraction of noncondensed components in the neutron number as a result of the strong-coupling effect. Our results indicate that superfluid fluctuations are important for thermodynamic properties in neutron stars.

本文言語English
論文番号065802
ジャーナルPhysical Review C
102
6
DOI
出版ステータスPublished - 2020 12 3

ASJC Scopus subject areas

  • 核物理学および高エネルギー物理学

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