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.

中文翻译：

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快速风味不稳定性模拟的代码比较

预计快速风味不稳定性（FFI）在核心坍缩超新星和中子星合并中无处不在。它以一种可能影响爆炸机制、中微子信号、质量外流和核合成的方式快速改变中微子的味道。FFI 模拟中使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。我们使用五个独立的代码模拟一个标准化的测试问题，并验证它们都在轴对称和两个方向上的均匀性假设下忠实地模拟了潜在的量子动力学方程。我们量化了每种方法中的数值误差量，并证明每种方法在该误差的至少一个指标上都具有优势。我们将结果公开作为基准。