Strong-coupling effects of pairing fluctuations, and Anderson-Bogoliubov mode in neutron S01 superfluids in neutron stars
Strong-coupling effects of pairing fluctuations, and Anderson-Bogoliubov mode in neutron S01 superfluids in neutron stars
复制标题
中子星中子 S01 超流体中配对涨落和 Anderson-Bogoliubov 模式的强耦合效应
DOI：
10.1103/physrevc.102.065802
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发表时间：
2020
影响因子：
3.1
通讯作者：
Nitta Muneto
中科院分区：
文献类型：
--
作者：
Inotani Daisuke;Yasui Shigehiro;Nitta Muneto
本文研究了中子星中超流序参量的热涨落和量子涨落对超流的影响。我们构造了一个可分离势，再现了用分波分析从核子散射数据中重建的相移。我们包括超流涨落内的强耦合近似开发的Nozières和施密特-林克和确定自洽的超流序参量以及化学势。我们表明，量子耗尽，这给了一个分数的非凝聚中子在零温度下，由于量子对波动，起着重要的作用，不仅在临界温度附近从超流态到正常状态，而且在零温度。我们推导出与相位涨落相关的Anderson-Bogoliubov模的色散关系，并表明由于强耦合效应，中子数中的非凝聚分量存在非零分数。我们的结果表明，超流涨落是重要的热力学性质的中子星。
We investigate effects of thermal and quantum fluctuations of the superfluid order parameter insuperfluids in neutron stars. We construct a separable potential to reproduce thephase 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.