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arXiv 2201.03565hep-thcond-mat.stat-mech
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离散旋转对称流体力学有效场论

Hydrodynamic effective field theories with discrete rotational symmetry

Xiaoyang Huang, Andrew Lucas

摘要:

我们开发了一个流体动力学的有效场论上的Schwinger-Keldysh轮廓的流体的电荷,能量和动量守恒,但只有离散的旋转对称性。热力学和一阶耗散流体力学的各向异性的后果在两个空间维度的一些简单的例子中详细说明,但我们的建设扩展到任何空间维度和任何旋转组(离散或连续)。我们在运动方程中发现了许多可能的项,这些项与熵流的存在是相容的,但与将流体与背景规范场和维尔拜因耦合的能力是不相容的。

英文摘要:

We develop a hydrodynamic effective field theory on the Schwinger-Keldysh contour for fluids with charge, energy, and momentum conservation, but only discrete rotational symmetry. The consequences of anisotropy on thermodynamics and first-order dissipative hydrodynamics are detailed in some simple examples in two spatial dimensions, but our construction extends to any spatial dimension and any rotation group (discrete or continuous). We find many possible terms in the equations of motion which are compatible with the existence of an entropy current, but not with the ability to couple the fluid to background gauge fields and vielbein.

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