Max Tegmark's Level One Multiverse

Last time, we looked at Max Tegmark’s version of the multiverse theory and its 4 levels. We briefly discussed what each of these levels of the multiverse would be like under Tegmark’s interpretation. Today, we will take an in-depth look at what the Level 1 multiverse is all about.

Around 1980, Alan Guth discovered some serious problems with the earliest stages of Alexander Friedmann’s version of the Big Bang model. In particular, the horizon problem; which says that if the Big Bang explosion happened everywhere, at an infinite number of points, then why is it the case that the temperature of the cosmic microwave–background radiation is almost identical in different regions of space? And the flatness problem; which simply asks, why is our universe so flat despite it being a highly unlikely outcome according to Friedmann’s equation. To answer these fine-tuning problems, Alan Guth proposed a revolutionary solution that he called inflation. He assumed the existence of an extremely dense point-like substance that was there before the Big Bang that defies all our everyday experiences. Meaning, if 1 gram of this substance expanded into twice the volume, its density would remain the same producing 2 grams of the substance. According to Einstein’s theory of gravity, such a substance could undergo a most remarkable explosion doubling its size at an exponential rate. This repeated doubling of the size automatically causes repeated doubling of the expansion speed. However, this exponential inflation process eventually slowed down to a much more relaxed pace, at least in our visible universe, as the inflating material decayed into ordinary matter gradually decelerated by gravity. Now, it should be noted that inflation generally refuses to stop, forever producing more space, as discovered for specific models by Andrei Linde and Paul Steinhardt. This is the concept of eternal inflation, the discovery of which has radically transformed our understanding of what’s out there in space on the largest scales. Moreover, the observations of Edwin Hubble and the discovery of dark energy gave a huge credibility boost to the theory of inflation further solidifying its place in the scientific literature. In summary, inflation has radically transformed our understanding of our cosmic origins, giving us infinite space with an infinite number of galaxies, stars, and planets.

[spencervance]

There may be an infinite number of universes but if cannot interact with them ours might as well be the only one.

[manasgoswami]

It means a there are aleph one or uncountable infinity number of infinitely sized universes in a type 1 multiverse

[elly]

I have a sort of rare question that has been bugging me for a while when thinking about the multiverse... Any sort of answer would be much appreciated. I am struggling with the idea of infinity and every possibilities that are realized.
If all possibilities happen somewhere, can there be a universe where there are more explanations and content (articles, blogs, videos etc.) in that universe explaining about the multiverse, omniverse, dimensions etc.? And speaking of multiverse, why there is not enough information about omniverse? Most internet search results are from fictional TV comics. Can there be a universe where there is a version of me who finds every different version of search results when exploring the internet, like another universe which copies of me find more or different search results about multiverse and/or omniverse contents, including infinitely different versions of this video you created? I hope my question is understandable. Thank you in advance!

[mwashere]

Wait so does that mean the singularity in black holes could explode, releasing everything it had devoured? That would be cool and chaotic

[Herlos]

what is with this ads that try to guilt trip you for not helping a dying child

[allshades]

In some universe I might be the king of earth.😀😀😀

[fierce]

Me who knows God made anything and everything including the multiverse