Speaker
Szymon Sikora
(Astronomical Observatory, Jagiellonian University)
Description
During this talk, I will present the method of the construction of the approximate solutions in the framework of the cosmological perturbation theory in the order higher than two. I will restrict to the synchronous gauge and impose the particular symmetry condition by demanding that the metric is invariant under every permutation of the spatial coordinates. In this setup, I will show how to specify the metric functions so that the resulting energy-momentum tensor approximates the dust energy-momentum tensor. I will mention the results obtained with Krzysztof Głód concerning the decaying mode and present the recent results dedicated to the growing mode.
