冷费米气体中超流能隙的普适修正
Universal corrections to the superfluid gap in a cold Fermi gas
AI总结：
本研究构建费米子有效场论框架计算冷费米气体超流能隙，给出完整次领头阶普适修正，发现相关效应会降低低密度能隙，并探讨其在中子星中子超流性中的应用。
摘要：
本文构建了一个用于计算费米子有效场论（EFT）中超流能隙的框架，该框架下费米子通过与动量无关的接触相互作用。该EFT中的领头阶普适修正为费米面处的单圈介质效应，可复现著名的Gor'kov-Melik-Barkhudarov结果。本文给出了完整的次领头阶普适修正，包括费米面外的单圈效应、双圈介质效应以及费米子传播子的修正。研究发现，这些效应共同会降低低密度下的能隙。本文还讨论了该研究在中子星中子超流性方面的应用。
英文摘要：
A framework for computing the superfluid gap in an effective field theory (EFT) of fermions interacting via momentum-independent contact forces is developed. The leading universal corrections in the EFT are one-loop in-medium effects at the Fermi surface, and reproduce the well-known Gor'kov-Melik-Barkhudarov result. The complete subleading universal corrections are presented here, and include one-loop effects away from the Fermi surface, two-loop in-medium effects, as well as modifications to the fermion propagator. Together, these effects are found to reduce the gap at low densities. Applications to neutron superfluidity in neutron stars are also discussed.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
