Acoustic attenuation rate in the Fermi-Bose model with a finite-range fermion-fermion interaction

Details Acoustic attenuation rate in the Fermi-Bose model with a finite-range fermion-fermion interaction Acoustic attenuation rate in the Fermi-Bose model with a finite-range fermion-fermion interaction

2006-11-09

arxiv.org/abs/cond-mat/0611259v1

Phys.Rev. A75 (2007) 013603

Physics

Condensed Matter

Other Condensed Matter

Scientific paper

10.1103/PhysRevA.75.013603

We study the acoustic attenuation rate in the Fermi-Bose model describing a mixtures of bosonic and fermionic atom gases. We demonstrate the dramatic change of the acoustic attenuation rate as the fermionic component is evolved through the BEC-BCS crossover, in the context of a mean-field model applied to a finite-range fermion-fermion interaction at zero temperature, such as discussed previously by M.M. Parish et al. [Phys. Rev. B 71, 064513 (2005)] and B. Mihaila et al. [Phys. Rev. Lett. 95, 090402 (2005)]. The shape of the acoustic attenuation rate as a function of the boson energy represents a signature for superfluidity in the fermionic component.

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