Hydrodynamic modes in a magnetized chiral plasma with vorticity
Hydrodynamic modes in a magnetized chiral plasma with vorticity
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DOI：
10.1103/physrevd.99.016017
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发表时间：
2018-07
影响因子：
5
通讯作者：
D. Rybalka;E. V. Gorbar;I. Shovkovy
中科院分区：
文献类型：
--
作者：
D. Rybalka;E. V. Gorbar;I. Shovkovy
在弛豫时间近似下，利用手征动力学理论的协变形式，导出了具有背景电磁场的带电手征等离子体的一阶耗散流体动力学方程。我们用真实的边界条件确定了圆柱形区域内旋转手性等离子体的整体平衡态。然后，利用线性化的流体动力学方程，辅以麦克斯韦方程，研究了磁化旋转手性等离子体在高温和高密度区的流体动力学模式。我们发现，在这两种情况下，动态电磁对传播模谱都有深刻的影响。特别是在高温区只有声波和阿尔芬波，而在高密度区只有等离子体和螺旋子。我们还表明，由于等离子体中的高电导率导致电荷涨落的有效屏蔽，手征磁波普遍被过度抑制。简要讨论了主要结果的物理意义。
By making use of a covariant formulation of the chiral kinetic theory in the relaxation-time approximation, we derive the first-order dissipative hydrodynamics equations for a charged chiral plasma with background electromagnetic fields. We identify the global equilibrium state for a rotating chiral plasma confined to a cylindrical region with realistic boundary conditions. Then, by using linearized hydrodynamic equations, supplemented by the Maxwell equations, we study hydrodynamic modes of magnetized rotating chiral plasma in the regimes of high temperature and high density. We find that, in both regimes, dynamical electromagnetism has profound effects on the spectrum of propagating modes. In particular, there are only the sound and Alfven waves in the regime of high temperature, and the plasmons and helicons at high density. We also show that the chiral magnetic wave is universally overdamped because of high electrical conductivity in plasma that causes an efficient screening of charge fluctuations. The physics implications of the main results are briefly discussed.