十维神经网络模拟器用于非线性物质功率频谱
Yanhui Yang1, Simeon Bird1, Ming-Feng Ho1,2,3
1University of California, Riverside, Department of Physics and Astronomy, 900 University Avenue, Riverside, California 92521, USA.
Physical review letters
|March 1, 2026
概括
我们开发了gokunemu,这是一个用于非线性物质功率光谱的快速神经网络模拟器. 该工具支持通过准确预测跨扩展参数空间的功率光谱来进行先进的宇宙学分析.
科学领域:
- 宇宙学的宇宙学是什么?
- 天体物理学 天体物理学
- 计算科学 计算科学
背景情况:
- 非线性物质功率光谱对于宇宙学参数推断至关重要.
- 下一代调查需要有效和准确的理论预测.
研究的目的:
- 介绍 gokunemu,一个10D神经网络模拟器用于非线性物质功率光谱.
- 支持下一代宇宙学分析,提供快速准确的预测.
主要方法:
- 使用了Goku N-body模拟套件和t2n-muse仿真框架.
- 开发了一个10维模拟器,涵盖了超越Lambda-CDM (ΛCDM) 的参数.
- 训练模拟器来预测0≤z≤3和0.006≤k/(h Mpc−1)≤10.的物质功率光谱.
主要成果:
- 在物质功率光谱预测中实现了~0.5%的平均准确度.
- 模拟器涵盖了扩展的参数:动态暗能量 (w0,wa),质量中微子 (mν),N<0xE2><0x82><0x91><0xE2><0x82><0x91>,以及光谱指数运行 (α<0xE2><0x82><0x9B>).
- 预测时间为每宇宙学大约2毫秒,比现有的模拟器要快数量级.
结论:
- Gokunemu是唯一一个模拟器,涵盖了由DESI约束所支持的动态暗能模型.
- 它的速度和广泛的参数覆盖范围使其成为即将到来的调查 (LSST,Euclid,Roman,CSST) 的理想选择.
- 能够有效地解释复杂的宇宙学数据.
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