In the paper cited below Milan Cirkovic argues that the multiverse provides a 'grand stage' in which the required low-entropy initial conditions can be expected to occur in at least some cases. The paper by Aguirre, Carroll et al takes a somewhat different tack by focusing on the occurrence of fluctations in de Sitter space - the state of near vacuum in the distant future, a phenomenon essential to Carroll's account which envisages 'baby universes' arising with conditions suitable for cosmological inflation out of such space.

The image below is taken from the article cited below from the CERN Courier. The caption reads: "A self-reproducing universe. This computer-generated simulation shows exponentially large domains, each with different laws of physics (associated with different colours). Peaks are new 'Big Bangs', with heights corresponding to the energy density" (simulations by Andrei and Dimitri Linde).