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| Lee Smolin |
In an
earlier post in this blog I mentioned a list of theories about multiverses,
independent and often mutually contradictory, prepared by George Ellis, the cosmologist.
These multiverses can be divided into two large groups:
- Non-hierarchical multiverses: such as the chaotic inflationary multiverse, where each universe
is supposed to be a bubble that has stopped its inflationary growth, amid
a permanent and total inflationary environment.
- Hierarchical multiverses: like Smolin's (which Ellis does not mention) and the multiverse of universe simulations (in other words: that we live in a simulation). In this post I speak exclusively about this type of multiverses, which share a property that, in my opinion, makes them implausible, if not impossible.
