Low-energy monopole modes of a trapped atomic Fermi gas

被引:18
|
作者
Bruun, GM [1 ]
机构
[1] NORDITA, DK-2100 Copenhagen, Denmark
关键词
D O I
10.1103/PhysRevLett.89.263002
中图分类号
O4 [物理学];
学科分类号
0702 ;
摘要
We consider the low energy collective monopole modes of a trapped weakly interacting atomic Fermi gas in the collisionless regime. The spectrum is calculated for varying coupling strength and chemical potential. Using an effective Hamiltonian, we derive analytical results that agree well with numerical calculations in various regimes. The onset of superfluidity is shown to lead to effects such as the vanishing of the energy required to create a Cooper molecule at a critical coupling strength and to the emergence of pair vibration excitations. Our analysis suggests ways to experimentally detect the presence of the superfluid phase in trapped atomic Fermi gases.
引用
收藏
页码:1 / 263002
页数:4
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