Physics – Condensed Matter – Soft Condensed Matter
Scientific paper
2001-04-16
Physics
Condensed Matter
Soft Condensed Matter
4 pages, 3 figures
Scientific paper
10.1103/PhysRevLett.88.070408
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.
Meystre Pierre
Pu Han
Wilkens Martin
Zhang Weiping
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