标题： WHFast512：一种针对行星系统的辛N体积分器，并优化了AVX512指令 显示英文标题

标题： WHFast512: A symplectic N-body integrator for planetary systems optimized with AVX512 instructions

摘要： 我们描述了使用单指令多数据（SIMD）并行性和512位高级矢量扩展（AVX512）实现的辛N体积分器WHFast512。与非向量化版本相比，我们可以将行星系统的积分速度提高多达4.7倍。WHFast512可以在不到1.4天的时间内将太阳系中包含8大行星的系统积分50亿年。据我们所知，这使WHFast512成为此类系统的最快的直接N体积分器。作为示例，我们展示了太阳系的一组400亿年的积分结果。忽略太阳的主序星演化后，我们表明不稳定性速率可以通过扩散模型很好地捕捉到。WHFast512可在REBOUND软件包中免费获得。 显示英文摘要

摘要： We describe the implementation of the symplectic N-body integrator WHFast512 using Single Instruction Multiple Data (SIMD) parallelism and 512-bit Advanced Vector Extensions (AVX512). We are able to speed up integrations of planetary systems by up to 4.7x compared to the non-vectorized version of WHFast. WHFast512 can integrate the Solar System with 8 planets for 5 billion years in less than 1.4 days. To our knowledge, this makes WHFast512 the fastest direct N-body integrator for systems of this kind. As an example, we present an ensemble of 40-Gyr integrations of the Solar System. Ignoring the Sun's post-main sequence evolution, we show that the instability rate is well captured by a diffusion model. WHFast512 is freely available within the REBOUND package.