水动力模拟的粗粒化尺度与有效性
Coarse graining scale and effectiveness of hydrodynamic modeling
摘要：
讨论了相对论性重离子碰撞的流体力学方法的一些基本问题，旨在阐明我们可以在多大程度上利用这种方法来提取关于所产生的QCD物质的性质和动力学的有用信息。我们强调的重要性，所需的流体动力学建模，确定的空间-时间分辨率和相关的限制集体流动可观的粗粒度的规模。我们发现，某些种类的可观测量可以指示的不均匀性程度的初始条件下，严格的条件比本地热平衡受到粗粒度尺度兼容的情况。
英文摘要：
Some basic questions about the hydrodynamical approach to relativistic heavy ion collisions are discussed aiming to clarify how far we can go with such an approach to extract useful information on the properties and dynamics of the QCD matter created. We emphasize the importance of the coarse-graining scale required for the hydrodynamic modeling which determines the space-time resolution and the associated limitations of collective flow observables. We show that certain kinds of observables can indicate the degree of inhomogeneity of the initial condition under less stringent condition than the local thermal equilibrium subjected to the coarse-graining scale compatible to the scenario.
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