Orateur
Prof.
Luca Salasnich
(Department of Physics, University of Padova)
Description
The unitary Fermi gas made of dilute and ultracold atoms with an infinite s-wave inter-atomic scattering length is discussed. First we introduce an efficient Thomas-Fermi-von Weizsacker density functional which describes accurately the density profile of the unitary Fermi gas trapped by an external potential. Then, the collective frequencies of monopole, quadrupole and octupole oscillations are derived from superfluid hydrodynamic equations which are the time-dependent extension of the Thomas-Fermi-von Weizsacker density functional. Finally, we show that this amazing Fermi gas supports supersonic and subsonic shock waves.
REFERENCES
L. Salasnich and F. Toigo, "Extended Thomas-Fermi Density Functional for the Unitary Fermi Gas", Phys. Rev. A 78, 053626 (2008).
L. Salasnich, F. Ancilotto, and F. Toigo, "Surface Effects in the Unitary Fermi Gas", Laser Phys. Lett. 7, 78-83 (2010).
L. Salasnich, "Low-temperature thermodynamics of the unitary Fermi gas: superfluid fraction, first sound and second sound", Phys. Rev. A 82, 063619 (2010).
L. Salasnich, "Supersonic and subsonic shock waves in the unitary Fermi gas", submitted for publication (2011).
Author
Prof.
Luca Salasnich
(Department of Physics, University of Padova)
