论文标题
自旋流体动力学和对称能量量张量 - 由自旋涡度引起的电流 -
Spin Hydrodynamics and Symmetric Energy-Momentum Tensors -- A current induced by the spin vorticity --
论文作者
论文摘要
我们讨论相对论自旋流体动力学的难题。在先前的公式中，来自规范能量量张量（EMT）的反对称部分的自旋源至关重要。 Belinfante改进的EMT是从规范EMT转变的伪规格，通常是一个物理上明智的选择，尤其是当仪表场与磁性水力动力学相结合时，但是Belinfante EMT没有抗对称部分。我们发现，在非平衡情况下，伪转化的熵电流在物理上是不相等的。我们还确定了由Belinfante对称EMT读取的自旋涡度引起的电流。
We discuss a puzzle in relativistic spin hydrodynamics; in the previous formulation the spin source from the antisymmetric part of the canonical energy-momentum tensor (EMT) is crucial. The Belinfante improved EMT is pseudo-gauge transformed from the canonical EMT and is usually a physically sensible choice especially when gauge fields are coupled as in magnetohydrodynamics, but the Belinfante EMT has no antisymmetric part. We find that pseudo-transformed entropy currents are physically inequivalent in nonequilibrium situations. We also identify a current induced by the spin vorticity read from the Belinfante symmetric EMT.
