Phonon Spectrum and Dynamical Stability of a Dilute Quantum Degenerate Bose-Fermi Mixture
- We calculate the phonon excistation spectrum in a zero-temperature dilute boson-fermion gaseous mixture. We show how the sound velocity changes due to the boson-fermion interaction, and we determine the dynamical stability regime of a homogeneous mixture. We identify a resonant phonon-exchange interaction between the fermions as the physical mechanism leading to the instability.
| Author details: | Han Pu, Weiping Zhang, Martin WilkensORCiD, Pierre Meystre |
|---|---|
| Publication type: | Article |
| Language: | English |
| Year of first publication: | 2002 |
| Publication year: | 2002 |
| Release date: | 2017/03/24 |
| Source: | Physical Review Letters. - 88 (2002), 7, 070408-1 - 070408-4 |
| Organizational units: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik und Astronomie |
| Institution name at the time of the publication: | Mathematisch-Naturwissenschaftliche Fakultät / Institut für Physik |
