In the SCG Einstein equation, the zero mode is responsible for the inflationary expansion, and the non-zero modes are responsible for the emergence of structure.

At the early stages of inflation, the scalar field’s vacuum state is homogeneous and isotropic (the Bunch-Davies vacuum).  Now apply to this, the CSL theory (a particular dynamical collapse theory).  The random collapses that result are then responsible for the emergence of structure out of initial homogeneity/isotropy.