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- Title
Single-particle excitations and the order parameter for a trapped superfluid Fermi gas.
- Authors
Baranov, M. A.
- Abstract
It is found that the character of single-particle excitations of a trapped neutral-atom Fermi gas is strongly influenced by a superfluid phase transition. Below the transition temperature the presence of a spatially inhomogeneous order parameter (gap) shifts the excitation eigenenergies upward and leads to the appearance of in-gap excitations localized in the outer part of the gas sample. The eigenenergies become sensitive to the gas temperature and are no longer multiples of the trap frequencies. These features should manifest themselves in a strong change of the density oscillations induced by modulations of the trap frequencies and can be used for identifying the superfluid phase transition. © 1999 American Institute of Physics.
- Subjects
ELECTRON gas; PHASE transitions; SUPERFLUIDITY
- Publication
JETP Letters, 1999, Vol 70, Issue 6, p396
- ISSN
0021-3640
- Publication type
Article
- DOI
10.1134/1.568187