Sound propagation and oscillations of a superfluid Fermi gas in the presence of a one-dimensional optical lattice
- 3 May 2005
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review A
- Vol. 71 (5), 053602
- https://doi.org/10.1103/physreva.71.053602
Abstract
We develop the hydrodynamic theory of Fermi superfluids in the presence of a periodic potential. The relevant parameters governing the propagation of sound (compressibility and effective mass) are calculated in the weakly interacting BCS limit. The conditions of stability of the superfluid motion with respect to creation of elementary excitations are discussed. We also evaluate the frequency of the center-of-mass oscillation when the superfluid gas is additionally confined by a harmonic trap.Keywords
Other Versions
This publication has 11 references indexed in Scilit:
- Observation of Dynamical Instability for a Bose-Einstein Condensate in a Moving 1D Optical LatticePhysical Review Letters, 2004
- Insulating Behavior of a Trapped Ideal Fermi GasPhysical Review Letters, 2004
- Umklapp Collisions and Center-of-Mass Oscillations of a Trapped Fermi GasPhysical Review Letters, 2004
- Superfluid dynamics of a Bose–Einstein condensate in a periodic potentialNew Journal of Physics, 2003
- Collective Excitations of a Trapped Bose-Einstein Condensate in the Presence of a 1D Optical LatticePhysical Review Letters, 2003
- Macroscopic Dynamics of a Trapped Bose-Einstein Condensate in the Presence of 1D and 2D Optical LatticesPhysical Review Letters, 2002
- Josephson Junction Arrays with Bose-Einstein CondensatesScience, 2001
- Phonon approach to an array of traps containing Bose-Einstein condensatesPhysical Review A, 1999
- A microscopic theory of the Josephson junction formed in an atomic scalePhysica C: Superconductivity and its Applications, 1994
- Random-Phase Approximation in the Theory of SuperconductivityPhysical Review B, 1958