Multiverse

Multiverses can be distinguished in 4 different levels

Level I is where other such regions far away in space where the apparent laws of physics are the same, but where history would be different because things happened differently.

Level II is where regions of space where even the apparent laws of physics are different.

Level III is where parallel worlds elsewhere in Hilbert space where quantum reality plays out.

Level IV is where totally disconnected realities are governed by different mathematical equations.


Here are George Ellis' main anti-multiverse arguments:

Inflation might be wrong

String theory may be wrong

Quantum mechanics may be wrong

Multiverses may be unfalsifiable

Some claimed multiverse evidence is dubious

Fine-tuning arguments may assume too much

It's a slippery slope to even bigger multiverses


Inflation makes Level I multiverse

Level I multiverse with string theory makes Level II multiverse

Level II multiverse with quantum mechanics makes Level III multiverse


For more information go to: http://www.scientificamerican.com/article.cfm?id=multiverse-the-case-for-parallel-universe