论文标题
p波相互作用的费米气体中的运输
Transport in p-wave interacting Fermi gases
论文作者
论文摘要
自旋极化费米气体的散射特性以P波相互作用为主。除了它们固有的角度依赖性外，这些相互作用与S波的相互作用不同，因为它们还需要有限的有效范围，以了解系统的低能特性。在本文中，我们研究了在正常相中，三维自旋偏振气体的剪切粘度和导热率如何取决于有效范围和弱相互作用的限制中的有效范围和散射体积。我们表明，尽管剪切粘度和热导率都明确取决于谐振附近的有效范围，但是参数的PRANDTL数字与动量与热扩散率的比率没有明确的相互作用在共振和弱相互作用的相互作用依赖性。与S波系统相反，P波散射在正阳性能量下从准结合状态下表现出额外的共振，从而导致在特定温度下剪切粘度的明显倾斜。
The scattering properties of spin-polarized Fermi gases are dominated by p-wave interactions. Besides their inherent angular dependence, these interactions differ from their s-wave counterparts as they also require the presence of a finite effective range in order to understand the low-energy properties of the system. In this article we examine how the shear viscosity and thermal conductivity of a three-dimensional spin-polarized Fermi gas in the normal phase depend on the effective range and the scattering volume in both the weakly and strongly interacting limits. We show that although the shear viscosity and thermal conductivity both explicitly depend on the effective range near resonance, the Prandtl number which parametrizes the ratio of momentum to thermal diffusivity does not have an explicit interaction dependence both at resonance and for weak interactions in the low-energy limit. In contrast to s-wave systems, p-wave scattering exhibits an additional resonance at weak attraction from a quasi-bound state at positive energies, which leads to a pronounced dip in the shear viscosity at specific temperatures.
