The Multiverse of...Reality?

You are probably familiar with sci-fi multiverses. While it is true that we are nowhere close to being able to traverse the hypothetical multiverse, it is possible that one does exist in real life. 

I mean, multiverses are by nature undiscoverable, only coming into practical reality due to hugely cosmic magic or tech.

So the fact that we haven't been able to find any proof doesn't actually disprove it's existence. It is unfalsifiable, so it is not an accepted framework of reality, though accepted as a potential by many theoretical and fringe physicists.

So even without anything to point to a real multiverse, it is still possible. What if we did have something that points to it? 

We do. It is called quantum superposition, where a particle exists in a sea of possibilities, an unfixed reality. When a particle is left alone without anyone looking at it, the particle exists at several places at once. Once someone looks at it and it knows it is being looked at, the particle is forced to choose one place to exist. 

This isn't just a theory. It has been proved by science that particles exhibit this characteristic. How do they observe a particle in superposition? By an advanced optics system with mirrors and all that stuff so that the particle doesn't know it is being looked at.

I'm sure you're wondering why everything isn't existing in a sea of possibilities if every particle is like that. Because the way things work at the subatomic scale are far different from how they work on a macroscopic scale. 

So why does this point to a multiverse? There are 2 promary ways to explain the superpositions phenomenon and one of them is the many worlds interpretation (MWI). In this popular view, every time a quantum particle is forced to choose one single point of existence, all the choices it didn't make but could've made branches off into another universe, one universe for each possible choice.

Another view is Schrodinger's cat. In this view, say a cat is placed in a box and left there with poisonous fumes. The cat remains alive until someone opens the box and observed the cat, theorizing that it is in a limbo between alive and dead, and its fate is sealed only when someone looks at it. While a highly intriguing theory, this contradicts common sense. Beings die regardless of someone's observance. The observance merely informs you of the death.

I also would choose MWI because it would be the most interesting view and I simply would enjoy the thought of it being true.

So what theoretically happens with quantum-level multiverses? There are several possibilities. One is that each of the possibilities of the particle branches into a new universe where the only thing different from our original timeline is that one little subatomic choice. 

Another is that each possibility that wasn't chosen in our timeline simply becomes isolated in another "universe" consisting of only that one particle, which is about as good as non-existence. I believe this is most likely to be what really happens if a multiverse is real, though that would be the most boring outcome. Yes, no one else has proposed that framework for MWI, so I think I will call it the Isolated Particle Multiverse Theory. Will expand on in another article.

 A third possibility is that every quantum possibility goes to a completely new and different universe, opening what we usually think of as a multiverse. This is where there are practically an infinite number of universes with every universe being different from every other one. 

This also opens up theories for every possible choice each person could make opening a new timeline. For example, say you decide to play basketball for the next hour. That is what happens in our timeline, or  base reality. But you could have played tennis or soccer or football or...the possibilities are endless, especially when you factor in each micro choice. The multiverse is where every choice you could have realistically made lived out. In this theory, only living beings can open a new branch of the multiverse.

Another thing that should be addressed is that a multiverse is necessary in theoretical frameworks to allow some forms of time travel. Will address that in another article.