在实现百分比精度的道路上IV：ReACT --计算$Λ$ CDM之外的非线性功率谱
On the road to percent accuracy IV: ReACT -- computing the non-linear power spectrum beyond $Λ$CDM
摘要：
为了有效地利用大尺度结构调查，我们依赖于非线性宇宙结构形成的准确和可靠的预测。因此，有效和全面的计算建模工具是必不可少的宇宙学参数推断分析。我们介绍了公共软件包ReACT，展示了其快速准确计算非标准物理非线性功率谱的能力。我们通过对DGP和$f(R)$重力模型的一系列分析来展示ReACT，采用类似LSST的宇宙剪切功率谱。与仅限于准线性状态的分析相比，使用ReACT的精确非线性建模有可能使LSST对$f(R)$参数的约束力增加一倍以上。我们发现，ReACT对于当前和正在进行的调查的$Λ$ CDM之外的理论的一致约束的推断是足够稳健的。随着进一步的改进，特别是在非线性$Λ$ CDM功率谱的精度方面，ReACT原则上可以满足未来测量（如Euclid和LSST）的精度要求。
英文摘要：
To effectively exploit large-scale structure surveys, we depend on accurate and reliable predictions of non-linear cosmological structure formation. Tools for efficient and comprehensive computational modelling are therefore essential to perform cosmological parameter inference analyses. We present the public software package ReACT, demonstrating its capability for the fast and accurate calculation of non-linear power spectra from non-standard physics. We showcase ReACT through a series of analyses on the DGP and $f(R)$ gravity models, adopting LSST-like cosmic shear power spectra. Accurate non-linear modelling with ReACT has the potential to more than double LSST's constraining power on the $f(R)$ parameter, in contrast to an analysis that is limited to the quasi-linear regime. We find that ReACT is sufficiently robust for the inference of consistent constraints on theories beyond $Λ$CDM for current and ongoing surveys. With further improvement, particularly in terms of the accuracy of the non-linear $Λ$CDM power spectrum, ReACT can, in principle, meet the accuracy requirements for future surveys such as Euclid and LSST.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
