论文标题
偶性费米气体中的各向异性声学
Anisotropic acoustics in dipolar Fermi gases
论文作者
论文摘要
我们考虑在超低中的平面波模式，但不在流体动力学极限下偶极的偶极气体。纵向波在声速和阻尼的速度上都表现出各向异性，并在其流速速度中产生了小小的发出效果。出现了两种不同类型的剪切波，一种``熟悉''，另一种伴随着非平凡的密度和温度调制。我们提出这些剪切模式作为测量粘度系数（包括其各向异性）的实验手段。
We consider plane wave modes in ultracold, but not quantum degenerate, dipolar Fermi gases in the hydrodynamic limit. Longitudinal waves present anisotropies in both the speed of sound and their damping, and experience a small, undulatory effect in their flow velocity. Two distinct types of shear waves appear, a ``familiar" one, and another that is accompanied by nontrivial density and temperature modulations. We propose these shear modes as an experimental means to measure the viscosity coefficients, including their anisotropies.
