Abstract:Année de publication : 2014
We present detailed simulation measurement of the nonlinear response of the power spectrum to small variations in the linear counterpart in the context of cosmological large-scale structure formation. While the mode-coupling structure can be explained to a large extent with the standard perturbation theory, we show that the coupling of the short-wave modes are however significantly damped away making them contributing only weakly to the growth of long-wave modes. This is the first time such an effect is measured. It is of crucial importance for the use of large-scale cosmological data as probes of fundamental cosmological or physical parameters.