I just saw a BBC special on m-theory and in the last minute of the show one of the physicist mentions that it could be possible to create a universe in a lab that could detach itself from ours as it expanded. He didn't elaborate beyond that and I wonder what kind of mechanics would be used to pull off a feat like that? Would it have to happen in a particle collider like the LHC, or is there another way it could be possible? It has been mentioned that it would start with the creation of a miniature black hole but then somehow it needs to develop a repulsive force so that it expands hence creating a universe. Much of my reading into mini black holes suggest they would fizzle away rather quickly due to Hawking radiation. So how would you cause the black hole to have a repulsive force instead of simply fizzing away?