Let's return to our thought experiment. In order to realize such an experiment, first of all, we need to invent a technology with which we can copy your brain, that is, what you really are, transmit its state over a distance with instantaneous (or almost instantaneous) speed, and then – the most interesting thing – put this state into another brain. Now for the even more curious part. You have probably all seen how under the influence of hypnosis a person becomes, to put it mildly, a different personality. It is as if the body remained, but the consciousness, the personality became different. Similarly, in this case, when realizing such an influence, the consciousness, getting into a new body, puts that brain as if in a coma state, that is, it disconnects it, and then acts on its own. Besides, a timer program will be laid down, and it, this first mind, will switch off at the appointed time and return to the original body. And the person from which the mind and consciousness were sent will then know and remember everything that he felt in another's body. Here is a miracle, which is partially already real.
Imagine if someone had told you at the dawn of the invention of electricity that one day the whole world would be covered with wires. You would have said, "There are not enough resources for that, it is impossible to realize. Wouldn't you? And now think… if I tell you that such installation, which probably will not differ much from virtual reality installation, will become a common commodity, and such flights to parallel worlds will be entertainment and attraction. Well? You'll say: here it carries. Discoverers have always fled from primitive consciousness to the depths of space. Let's get rid of primitive consciousness.
Some will say, "Wait, wait, wait, let's deal with it on Earth. Let's assume that all this is true. The technology of consciousness transfer already exists. Quantum teleportation is known to science. But tell me, please, what makes you think that there are these parallel worlds?
I'll answer: it all comes from what I said. I was talking about quantum entanglement. That is to clarify: entanglement is not from the word "entanglement", but from the fact that one particle has a double, which allows parallel reality, somewhere its state changes with instantaneous speed. Repeats the particle like you in a mirror – your reflection.