Breakdown of hydrodynamics in the radial breathing mode of a strongly interacting Fermi gas
Breakdown of hydrodynamics in the radial breathing mode of a strongly interacting Fermi gas
复制标题
DOI：
10.1103/physreva.70.051401
复制
发表时间：
2004-08
影响因子：
2.9
通讯作者：
J. Kinast;A. Turlapov;John E. Thomas
中科院分区：
文献类型：
--
作者：
J. Kinast;A. Turlapov;John E. Thomas
We measure the magnetic-field dependence of the frequency and damping time for the radial breathing mode of an optically trapped Fermi gas of $^{6}\mathrm{Li}$ atoms near a Feshbach resonance. The measurements address the apparent discrepancy between the results of Kinast et al. [Phys. Rev. Lett. 92, 150402 (2004)] and those of Bartenstein et al. [Phys. Rev. Lett. 92, 203201 (2004)]. Over the range of magnetic field from $770\phantom{\rule{0.5em}{0ex}}\text{to}\phantom{\rule{0.5em}{0ex}}910\phantom{\rule{0.3em}{0ex}}\mathrm{G}$, 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 $925\phantom{\rule{0.3em}{0ex}}\mathrm{G}$, the measured frequency begins to decrease below predictions. For fields near $1080\phantom{\rule{0.3em}{0ex}}\mathrm{G}$, 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 $910\phantom{\rule{0.3em}{0ex}}\mathrm{G}$.
We measure the magnetic-field dependence of the frequency and damping time for the radial breathing mode of an optically trapped Fermi gas of $^{6}\mathrm{Li}$ atoms near a Feshbach resonance. The measurements address the apparent discrepancy between the results of Kinast et al. [Phys. Rev. Lett. 92, 150402 (2004)] and those of Bartenstein et al. [Phys. Rev. Lett. 92, 203201 (2004)]. Over the range of magnetic field from $770\phantom{\rule{0.5em}{0ex}}\text{to}\phantom{\rule{0.5em}{0ex}}910\phantom{\rule{0.3em}{0ex}}\mathrm{G}$, 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 $925\phantom{\rule{0.3em}{0ex}}\mathrm{G}$, the measured frequency begins to decrease below predictions. For fields near $1080\phantom{\rule{0.3em}{0ex}}\mathrm{G}$, 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 $910\phantom{\rule{0.3em}{0ex}}\mathrm{G}$.