Phonon spectrum and dynamical stability of a quantum degenerate Bose-Fermi mixture
Soft Condensed Matter
2009-11-07 v2
Abstract
We calculate the phonon excitation spectrum in a zero-temperature boson-fermion 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.
Keywords
Cite
@article{arxiv.cond-mat/0104279,
title = {Phonon spectrum and dynamical stability of a quantum degenerate Bose-Fermi mixture},
author = {Han Pu and Weiping Zhang and Martin Wilkens and Pierre Meystre},
journal= {arXiv preprint arXiv:cond-mat/0104279},
year = {2009}
}
Comments
4 pages, 3 figures