Spin oscillations of the normal polarized Fermi gas at unitarity

Year: 2010

Authors: Recati A., Stringari S.

Autors Affiliation: Dipartimento di Fisica, Università di Trento and CNR-Istituto Nazionale di Ottica Center on Bose-Einstein Condensation, I-38123 Povo, Italy

Abstract: 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 in-phase and the 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.


Volume: 82 (1)      Pages from: 013635  to: 013635

More Information: We acknowledge N. Navon for the experimental data and F. Chevy, S. Giorgini, C. Salomon, and W. Zwerger for useful discussions. This research has been supported by EuroQUAM Fermix program and by MIUR PRIN 2007.
DOI: 10.1103/PhysRevA.82.013635

Citations: 4
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