In the BBC video “Why there could be many identical copies of you“, Melissa Hogenboom interviews physicists and scientist to understand how (nearly) identical copies of ourselves can exists both far away (googolplex meters) in the cosmos and in parallel quantum dimensions.
One of the questions that comes up is whether quantum twins have one mind connecting our parallel selves or each of our parallel selves has it’s own mind. The possibility of merging parallel universes back together by forgetting things is discussed. My experience and intuition leads me to believe that we have a classical mind that exists in one classical universe and we have a quantum mind that exists in the quantum universe, where the quantum universe contains an infinite number of classical universes.
Because reality is a quantum universe and not a single classical universe, then the question of whether we have a cosmic twin in the classical universe is not that interesting. To consider us as a classical being in one classical universe ignores all of the other classical universes in which our energy exists. So, while classical probability theory predicts that somewhere in our classical universe we have a cosmic twin, this cosmic twin is only an infinitesimal sliver of our full quantum self. When you consider our full quantum self, then there is only one – the one which you experience. You can both classically experience yourself and quantum experience yourself. When you quantum experience yourself, you are experiencing your parallel selves in other classical universes.