It is also this has already happened and there is a statistical likelihood is that we're located somewhere in that chain of simulations. But Professor Martin Savage at the University of Washington says there are already "signatures of resource constraints" which could tell us if larger models are possible.
Computers used to build simulations perform "lattice quantum chromodynamics calculations" could find similarities within our own universe. If you make the simulations big enough, something like our universe should emerge," Savage said.
Zohreh Davoudi, one of Savage's students said it might be possible to communicate with those other universes if they are running on the same operating system. Of course some would argue that Apple users were already living in an alternative universe already and cannot be contacted by common sense.