Sound propagation and oscillations of a superfluid Fermi gas in the presence of a one-dimensional optical lattice

Journal Article · Sun May 15 00:00:00 EDT 2005 · Physical Review. A

DOI:https://doi.org/10.1103/PhysRevA.71.053602· OSTI ID:20717787

Pitaevskii, L P ^[1]; Stringari, S; Orso, G ^[1]

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1. Dipartimento di Fisica, Universita di Trento and BEC-INFM, 1-38050 Povo (Italy)

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.

• OSTI ID: 20717787
• Journal Information: Physical Review. A, Vol. 71, Issue 5; Other Information: DOI: 10.1103/PhysRevA.71.053602; (c) 2005 The American Physical Society; Country of input: International Atomic Energy Agency (IAEA); ISSN 1050-2947
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
BCS THEORY
COMPRESSIBILITY
EFFECTIVE MASS
EXCITATION
FERMI GAS
FERMIONS
HYDRODYNAMICS
ONE-DIMENSIONAL CALCULATIONS
OSCILLATIONS
PERIODICITY
POTENTIALS
SOUND WAVES
STABILITY
SUPERFLUIDITY
TRAPS
WAVE PROPAGATION