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Breakdown of Hydrodynamics in the Radial Breathing Mode of a Strongly-Interacting Fermi Gas | | J. Kinast
; A. Turlapov
; J. E. Thomas
; | | Date: |
28 Aug 2004 | | Journal: | Phys. Rev. A 70, 051401(R) (2004) | | Subject: | Soft Condensed Matter | cond-mat.soft | | Abstract: | We measure the magnetic field dependence of the frequency and damping time for the radial breathing mode of an optically trapped, Fermi gas of $^6$Li atoms near a Feshbach resonance. The measurements address the apparent discrepancy between the results of Kinast et al., [Phys. Rev. Lett. {f 92}, 150402 (2004)] and those of Bartenstein et al., [Phys. Rev. Lett. {f 92}, 203201 (2004)]. Over the range of magnetic field from 770 G to 910 G, the measurements confirm the results of Kinast et al. Close to resonance, the measured frequencies are in excellent agreement with predictions for a unitary hydrodynamic gas. At a field of 925 G, the measured frequency begins to decrease below predictions. For fields near 1080 G, we observe a breakdown of hydrodynamic behavior, which is manifested by a sharp increase in frequency and damping rate. The observed breakdown is in qualitative agreement with the sharp transition observed by Bartenstein et al., at 910 G. | | Source: | arXiv, cond-mat/0408634 | | Services: | Forum | Review | PDF | Favorites | |
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