First of all my apologies in case my understanding turns out to be wrong and idiotic. Being a layman in physics and cosmology, i have just started reading Brian Greene's book "The Hidden Reality". Now i am confused because of some passages from the book:
"Think of the universe as a gigantic block of Swiss cheese, with the cheesy parts being regions where the inflaton field’s value is high and the holes being regions where it’s low.
Taken together, the two processes yield an everexpanding block of cosmic cheese riddled with an ever-growing number of holes. In the more standard language of cosmology, each hole is called a bubble universe."
Is the "block of cheese" the Multiverse? Or is it our Universe, which wouldn't make a lot of sense to me. If it is the multiverse, does it mean that the inflation field permeates throughout the multiverse, and is not limited to our universe?
Also, the "bubble" universes expanding "like in the cheese" don't really make sense to me if some of the universes are flat, in this case infinite? How can an infinite universe even be located inside something? Wouldn't it occupy all the space, instead of a "bubble"?
Edit: Also, are the laws of physics limited to our Universe, or the entire Multiverse?