research
One Hundred Simulations Reached Beyond Flat Cosmology
A two-stage halo emulator used evolution mapping to extend percent-level predictions into dynamical dark-energy tests.
Summary
A two-stage halo emulator used evolution mapping to extend percent-level predictions into dynamical dark-energy tests.
Aletheia separates parameters that shape the linear power spectrum from those that rescale its evolution, then predicts the halo mass function with two Gaussian-process stages. It trained on 100 flat-ΛCDM simulations and was tested both on independent runs and a dynamical-dark-energy suite. The authors report percent-level accuracy across a wide mass and redshift range, with modest degradation at early times. The public emulator extends the tested framework; accuracy outside its validation domain still requires checking.
Why it matters
A two-stage halo emulator used evolution mapping to extend percent-level predictions into dynamical dark-energy tests.
Limits and context
No additional limitation was separately recorded.
Key claims
A two-stage halo emulator used evolution mapping to extend percent-level predictions into dynamical dark-energy tests.
Evidence: source-2026-09-13-021
Sources
- arXiv preprint 2609.10665arXiv · primary research
Corrections
No corrections have been recorded for this story.