论文标题
模糊暗物质宇宙学模型的超分辨率模拟
Super-resolution simulation of the Fuzzy Dark Matter cosmological model
论文作者
论文摘要
AI超分辨率,结合了深度学习和N体模拟,已显示出在Lambda Cold Dark Matter宇宙学模型中成功重现大规模结构和光晕的丰度。在这里,我们将其使用扩展到具有不同暗物质含量的模型,在这种情况下,模糊暗物质(FDM),在近似值中,差异是在初始功率谱中编码的。我们专注于红移Z = 2,模拟模拟尺度较小和质量较低的模拟,后者的模拟比以前的AI超级分辨率工作中所做的。我们发现,超分辨率技术可以将功率谱和光晕质量函数重现为全高分辨率计算的百分之几。我们还发现,由细丝的虚假数值碎片引起的光环伪影在超分辨率输出中同样存在。尽管我们尚未使用全量子压力FDM模拟训练超分辨率算法,但它在相关长度和质量尺度上表现良好,这意味着它具有有望作为技术,可以避免在某些情况下避免后者的高计算成本。我们得出的结论是,AI超分辨率可以成为扩展模拟目录涵盖的暗物质模型范围的有用工具。
AI super-resolution, combining deep learning and N-body simulations has been shown to successfully reproduce the large scale structure and halo abundances in the Lambda Cold Dark Matter cosmological model. Here, we extend its use to models with a different dark matter content, in this case Fuzzy Dark Matter (FDM), in the approximation that the difference is encoded in the initial power spectrum. We focus on redshift z = 2, with simulations that model smaller scales and lower masses, the latter by two orders of magnitude, than has been done in previous AI super-resolution work. We find that the super-resolution technique can reproduce the power spectrum and halo mass function to within a few percent of full high resolution calculations. We also find that halo artifacts, caused by spurious numerical fragmentation of filaments, are equally present in the super-resolution outputs. Although we have not trained the super-resolution algorithm using full quantum pressure FDM simulations, the fact that it performs well at the relevant length and mass scales means that it has promise as technique which could avoid the very high computational cost of the latter, in some contexts. We conclude that AI super-resolution can become a useful tool to extend the range of dark matter models covered in mock catalogs.