Back to Search
Start Over
Density and spin modes in imbalanced normal Fermi gases from collisionless to hydrodynamic regime.
- Source :
-
Journal of Physics B: Atomic, Molecular & Optical Physics . 3/14/2018, Vol. 51 Issue 5, p1-1. 1p. - Publication Year :
- 2018
-
Abstract
- We study the mass- and population-imbalance effect on density (in-phase) and spin (out-of-phase) collective modes in a two-component normal Fermi gas. By calculating the eigenmodes of the linearized Boltzmann equation as well as the density/spin dynamic structure factor, we show that mass- and population-imbalance effects offer a variety of collective mode crossover behaviors from collisionless to hydrodynamic regimes. The mass-imbalance effect shifts the crossover regime to the higher-temperature, and a significant peak of the spin dynamic structure factor emerges only in the collisionless regime. This is in contrast to the case of mass- and population-balanced normal Fermi gases, where the spin dynamic response is always absent. Although the population-imbalance effect does not shift the crossover regime, the spin dynamic structure factor survives both in the collisionless and hydrodynamic regimes. [ABSTRACT FROM AUTHOR]
- Subjects :
- *HYDRODYNAMICS
*ELECTRON gas
Subjects
Details
- Language :
- English
- ISSN :
- 09534075
- Volume :
- 51
- Issue :
- 5
- Database :
- Academic Search Index
- Journal :
- Journal of Physics B: Atomic, Molecular & Optical Physics
- Publication Type :
- Academic Journal
- Accession number :
- 129875130
- Full Text :
- https://doi.org/10.1088/1361-6455/aaa594