Spin oscillations of the normal polarized Fermi gas at Unitarity

Details Spin oscillations of the normal polarized Fermi gas at Unitarity Spin oscillations of the normal polarized Fermi gas at Unitarity

2010-05-17

arxiv.org/abs/1005.3040v1

Phys. Rev. A 82, 013635 (2010)

Physics

Condensed Matter

Quantum Gases

5 pages, 1 figure

Scientific paper

Using density functional theory in a time dependent approach we determine the frequencies of the compressional modes of the normal phase of a Fermi gas at unitarity as a function of its polarization. Our energy functional accounts for the typical elastic deformations exhibited by Landau theory of Fermi liquids. The comparison with the available experiments is biased by important collisional effects affecting both the {\it in phase} and the {\it out of phase} oscillations even at the lowest temperatures. New experiments in the collisionless regime would provide a crucial test of the applicability of Landau theory to the dynamics of these strongly interacting normal Fermi gases.

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