Recovering Subtle Cosmological Information with the Zel'dovich-inspired Transform
The Zel’dovich-inspired (ZI) transform is a simple method to suppress gravitational non-Gaussianity in large-scale structure data. By applying this one-parameter nonlinear transform, researchers found that combining three different ZI power spectra significantly boosts the ability to constrain subtle cosmological parameters like primordial non-Gaussianity and neutrino mass compared to standard power spectra.