Measuring the Hydrodynamic Linear Response of a Unitary Fermi Gas
Measuring the Hydrodynamic Linear Response of a Unitary Fermi Gas
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DOI：
10.1103/physrevlett.123.160402
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发表时间：
2019-10-15
影响因子：
8.6
通讯作者：
Thomas, J. E.
中科院分区：
文献类型：
--
作者：
Baird, Lorin;Wang, Xin;Thomas, J. E.
我们直接观察到了受空间周期光学势的限制，并以从亚音速到超音速的速度转换到云中的么正费米气体的流体动力学线性响应。我们发现密度分布随时间的变化对导热系数很敏感，导热系数控制着温度梯度的松弛速率，从而控制绝热和等温压缩的响应。
We directly observe the hydrodynamic linear response of a unitary Fermi gas confined in a box potential and subject to a spatially periodic optical potential that is translated into the cloud at speeds ranging from subsonic to supersonic. We show that the time-dependent change of the density profile is sensitive to the thermal conductivity, which controls the relaxation rate of the temperature gradients and hence the responses arising from adiabatic and isothermal compression.