Power Spectra to 1% Accuracy between Dynamical Dark Energy Cosmologies

TL;DR

This paper presents high-precision N-body simulations of dynamical dark energy cosmologies, achieving percent-level accuracy in matter power spectra across redshifts, crucial for future cosmological surveys.

Contribution

It introduces a matching procedure that reproduces CMB distance and yields subpercent power spectra, advancing precision in dark energy modeling.

Findings

Achieved percent-level accuracy in power spectra at various redshifts.

Reproduced CMB distance to last scattering within subpercent accuracy.

Provided insights into dark energy effects on large scale structure.

Abstract

For dynamical dark energy cosmologies we carry out a series of N-body gravitational simulations, achieving percent level accuracy in the relative mass power spectra at any redshift. Such accuracy in the power spectrum is necessary for next generation cosmological mass probes. Our matching procedure reproduces the CMB distance to last scattering and delivers subpercent level power spectra at z=0 and z~3. We discuss the physical implications for probing dark energy with surveys of large scale structure.