Code comparison for fast flavor instability simulations
Code comparison for fast flavor instability simulations
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DOI：
10.1103/physrevd.106.043011
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发表时间：
2022-05
影响因子：
5
通讯作者：
S. Richers;H. Duan;Meng-Ru Wu;Soumya Bhattacharyya;Masamichi Zaizen;M. George;Chun-Yu Lin;Zewei Xiong
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文献类型：
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作者：
S. Richers;H. Duan;Meng-Ru Wu;Soumya Bhattacharyya;Masamichi Zaizen;M. George;Chun-Yu Lin;Zewei Xiong
快味不稳定性（FFI）在核心坍缩超新星和中子星星合并中普遍存在。它以一种可能影响爆炸机制、中微子信号、质量流出和核合成的方式迅速地洗牌中微子味道。在FFI模拟中采用的各种初始条件和模拟方法阻止了结果的苹果对苹果的比较。我们模拟了一个标准化的测试问题，使用五个独立的代码，并验证它们都忠实地模拟基本的量子动力学方程的假设下，轴对称和均匀的两个方向。我们量化了每种方法的数值误差量，并证明了每种方法在至少一个误差度量中是上级的。我们将结果公之于众，作为基准。
The fast flavor instability (FFI) is expected to be ubiquitous in core-collapse supernovae and neutron star mergers. It rapidly shuffles neutrino flavor in a way that could impact the explosion mechanism, neutrino signals, mass outflows, and nucleosynthesis. The variety of initial conditions and simulation methods employed in simulations of the FFI prevent an apples-to-apples comparison of the results. We simulate a standardized test problem using five independent codes and verify that they are all faithfully simulating the underlying quantum kinetic equations under the assumptions of axial symmetry and homogeneity in two directions. We quantify the amount of numerical error in each method and demonstrate that each method is superior in at least one metric of this error. We make the results publicly available to serve as a benchmark.