Bruun G M, Mottelson B R
Nordita, Blegdamsvej 17, 2100 Copenhagen, Denmark.
Phys Rev Lett. 2001 Dec 31;87(27 Pt 1):270403. doi: 10.1103/PhysRevLett.87.270403. Epub 2001 Dec 11.
We consider the low energy collective mode spectrum of a superfluid Fermi gas in a spherical trap in the collisionless regime. Using a self-consistent random-phase approximation, the effects of superfluidity on modes of dipole and quadrupole symmetries are systematically examined. The spectrum is calculated for varying pairing strength and temperature, and we identify several spectral features such as the emergence of Goldstone modes that can be used to detect the onset of superfluidity. Our analysis is relevant for present experiments aimed at observing a superfluid phase transition in trapped Fermi gases.
我们考虑无碰撞 regime 下球形陷阱中超流费米气体的低能集体模谱。使用自洽随机相位近似，系统地研究了超流性对偶极和四极对称性模式的影响。计算了不同配对强度和温度下的谱，并识别出了几个谱特征，如可用于检测超流性开始的戈德斯通模的出现。我们的分析与目前旨在观测捕获费米气体中超流相变的实验相关。
