反常- Viscous Fluid动力学中手征磁效应的量化
Quantifying Chiral Magnetic Effect from Anomalous-Viscous Fluid Dynamics
摘要：
手征磁效应（CME）是手征费米子多体系统中基本手征反常的宏观表现，在流体动力学框架下表现为反常输运流。CME的实验观测是非常有趣的，并已在狄拉克和外尔半金属中报道。在重离子碰撞中寻找日冕物质抛射也已作出了重大努力。CME信号的理论预测是CME研究的关键。在本文中，我们报告的第一个定量建模框架，异常粘性流体动力学（AVFD），计算费米子电流的演变上的现实散装演变的重离子碰撞，同时占异常和正常的粘性输运效应。AVFD允许CME诱导的电荷分离的产生和演变的流体动力学阶段，以及其依赖于理论成分的定量理解。与合理的估计的关键参数，AVFD模拟提供了第一个唯象成功的解释测量信号在200 AGeV的金-金碰撞。
英文摘要：
The Chiral Magnetic Effect (CME) is a macroscopic manifestation of fundamental chiral anomaly in a many-body system of chiral fermions, and emerges as anomalous transport current in the fluid dynamics framework. Experimental observation of CME is of great interest and has been reported in Dirac and Weyl semimetals. Significant efforts have also been made to look for CME in heavy ion collisions. Critically needed for such search, is the theoretical prediction for CME signal. In this paper we report a first quantitative modeling framework, the Anomalous Viscous Fluid Dynamics (AVFD), which computes the evolution of fermion currents on top of realistic bulk evolution in heavy ion collisions and simultaneously accounts for both anomalous and normal viscous transport effects. The AVFD allows a quantitative understanding of the generation and evolution of CME-induced charge separation during hydrodynamic stage as well as its dependence on theoretical ingredients. With reasonable estimates of key parameters, the AVFD simulations provide the first phenomenologically successful explanation of the measured signal in 200AGeV AuAu collisions.
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