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Oscillations of a Bose-Einstein condensate rotating in a harmonic plus quartic trap
M. Cozzini, A. L. Fetter, B. Jackson +1
We study the normal modes of a two-dimensional rotating Bose-Einstein condensate confined in a quadratic plus quartic trap. Hydrodynamic theory and sum rules are used to derive ana…
Effect of the Casimir-Polder force on the collective oscillations of a trapped Bose-Einstein condensate
Mauro Antezza, Lev P. Pitaevskii, Sandro Stringari
We calculate the effect of the interaction between an optically active material and a Bose-Einstein condensate on the collective oscillations of the condensate. We provide explicit…
Sound propagation and oscillations of a superfluid Fermi gas in the presence of a 1D optical lattice
L. P. Pitaevskii, S. Stringari, G. Orso
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 eff…
Collisions and expansion of an ultracold dilute Fermi gas
B. Jackson, P. Pedri, S. Stringari
We discuss the effects of collisions on the expansion of a degenerate normal Fermi gas, following the sudden removal of the confining trap. Using a Boltzmann equation approach, we…
Propagation of sound in a Bose Einstein condensate in an optical lattice
C. Menotti, M. Kramer, A. Smerzi +2
We study the propagation of sound waves in a Bose-Einstein condensate trapped in a one-dimensional optical lattice. We find that the velocity of propagation of sound wavepackets de…
Umklapp collisions and center of mass oscillation of a trapped Fermi gas
G. Orso, L. P. Pitaevskii, S. Stringari
Starting from the the Boltzmann equation, we study the center of mass oscillation of a harmonically trapped normal Fermi gas in the presence of a one-dimensional periodic potential…