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Collective excitations in Bose-Fermi mixtures
- Publication Year :
- 2018
-
Abstract
- We investigate collective excitations of density fluctuations and a dynamic density structure factor in a mixture of Bose and Fermi gases in a normal phase. With decreasing temperature, we find that the frequency of the collective excitation deviates from that of the hydrodynamic sound mode. Even at temperature much lower than the Fermi temperature, the collective mode frequency does not reach the collisionless limit analogous to zero sound in a Fermi gas, because of collisions between bosons and fermions.
- Subjects :
- Physics
Condensed Matter::Quantum Gases
Condensed matter physics
FOS: Physical sciences
Fermi energy
Zero sound
Fermion
Condensed Matter Physics
01 natural sciences
Atomic and Molecular Physics, and Optics
010305 fluids & plasmas
Quantum Gases (cond-mat.quant-gas)
0103 physical sciences
Quasiparticle
General Materials Science
010306 general physics
Structure factor
Fermi gas
Condensed Matter - Quantum Gases
Boson
Fermi Gamma-ray Space Telescope
Subjects
Details
- Language :
- English
- Database :
- OpenAIRE
- Accession number :
- edsair.doi.dedup.....9ef608e02faaa0c341af63c757a3f603