Complex sentence: This pushes the Universe into a very simple state, in which it is completely dominated by the inflaton field, the source of the cosmological constant, and the only significant inhomogeneities are the tiny quantum fluctuations in the inflaton.
Split into simpler sentences: This pushes the Universe into a very simple state, in which it is completely dominated by the inflaton field, the source of the cosmological constant. The only significant inhomogeneities are the tiny quantum fluctuations in the inflaton.