multiverse

【Universe with ∞ number】

The universe you live in has no name.

So let's name this universe "Your Universe".

There seems to be no doubt that ``the universe you live in'' is a ``one universe'' made of 4-dimensional space-time of ``3-dimensional space + time''.

However, in theoretical physics based on modern quantum mechanics, the existence of "another universe" other than "the universe you live in" is strongly suggested.

Moreover, the number of existence (quantity) is "∞".

If it is "∞", "the universe of all patterns" must exist.

Inside, there are an infinite number of other universes inhabited by you that are exactly like you.

There are an infinite number of universes that you live in that are a little different from yours, or universes that don't exist.

There are universes whose physical constants are different from "the universe you live in", and even the laws of physics are different.

In this blog, we will refer to these multiple (though infinite) collections of universes as multiverses.

【Is there anything that cannot be observed?】

In the multiverse, it is impossible to observe each other between each universe.

Because even if you travel at the speed of light, which is the fastest speed in the universe you live in, it is too far away to get out of this expanding universe.

Also, it seems that there is currently no way for matter, including you, that is stuck in this 4D space-time to exist apart from it.

However, there are many examples of what was once considered "impossible" to become "possible" in the future. The day will come when we can peer into another universe.

However, even though it cannot be observed, the multiverse must exist in theory.

The reason is that if the multiverse, which is recognized as an extension of the theory whose authenticity has been confirmed by many demonstration experiments, does not exist, there is an error somewhere in the theory itself, which is the root of it.

Also, in the last few decades, we have not been able to find strong findings that deny the existence of the multiverse and that are consistent with the results of these demonstration experiments.

Indeed, we cannot observe the multiverse at present.

But that's a matter of observation technique.

In other words, the correct expression is not "the unobservable does not exist", but rather "the unobservable that exists".

This is because although it was known from ancient times that the earth is round, it took thousands of years to see it. This is because the history tells us that it took many years from the beginning until we could actually observe it.

【you are not alone】

By the way, is "you exactly the same as you" in another universe really different from you?

To say "exactly the same" means that not only the person but the whole quantum situation of the universe is the same.

Since quanta have no individuality other than being represented by numbers, it is simple to think that if the numbers are the same, they are the same thing.

If so, ``you'' may be the result of your ``superposition'', which is exactly the same as you existing infinitely in another universe that includes you.

Yes, you are always an infinite superimposition of yourself, never alone.

And if that's correct, you're already observing other universes.