3 ms·
> Interesting case if we are the “ants” and it is our 3 dims happen to be compact looping somewhere beyond our event horizon. Multitude of Universes […] I thin
by codethief 2y ago
> Interesting case if we are the “ants” and it is our 3 dims happen to be compact looping somewhere beyond our event horizon. Multitude of Universes […]
I think you're mixing up two different cases here: 1) Our established 3 dimensions are actually compact, i.e. loop around or hit a boundary somewhere. No multiverse here. 2) There are extra dimensions, meaning that for every point in that extra dimension there's another 3-dimensional universe as we know it.
- fc417fc802 2y ago> Our established 3 dimensions are actually compact, i.e. loop around Do they not loop? What other option is there? I assume you can't sail off the edge of the disk, so to speak.
- AnimalMuppet 2y agoOption 1: They loop. Option 2: They go on forever without looping. Option 3: They end - there is some kind of boundary to spacetime.
- trhway 2y agoThe expansion of the space is the feature which prevents any physical process inside to distinguish between those options. Kind of a hack - make compact Universe, add expansion and it would inside look and feel indistinguishable from non-compact.
- fc417fc802 2y agoHow does option 2 fit with the big bang? The obvious issue (at minimum) being accounting for the CMB.
- trhway 2y agothe 1. makes 2. "easier", i.e. having a multitude of compact Universes is "cheaper" than having a multitude of non-compact ones