There are other multiverses with other worlds, but we have access to only this one. |
To be sure, a few philosophers have touted the putative merits of multiverses. |
He points out that, in most models, if you have inflation, you also get multiverses. |
He also summarizes string theory, the expansionary model of the universe, and the notion of multiverses. |
The only context in which QM enters is that the theory allows, but does not require, the possibility of multiverses. |
Some physicists feel uncomfortable about the theory that a particle has no single history, a theory that is crucial to the concept of multiverses as presently formulated. |