https://www.wired.com/story/sean-carroll-thinks-we-all-exist-on-multiple-worlds/
What is reality?
Carroll: The best answer we can give is that reality is a vector in Hilbert space. This is the technical way of saying that reality is described by a single quantum mechanical wave function.
OK, that’s abstract. Please conceptualize this?
We see tables and chairs and people and planets moving through spacetime. Quantum mechanics says that there are no such things as tables and chairs—there’s just something we call a wave function.
Our classical description of the world is a higher level, approximate way of talking about the wave function. The job of physicists and philosophers is to show how, if we live in a world that is just a wave function, then why does it look like there are people and planets and tables and chairs? We don’t have a definite consensus.
2 replies on “Multiple Worlds”
I have another book by Sean Carroll, good writer. I’m ordering this one. Hoping reading it will make more sense than this interview.
He’s getting a lot of press today.. this is the 3rd for 4th article I’ve seen mentioning his book.https://www.newscientist.com/article/mg24332472-900-bye-bye-space-time-is-it-time-to-free-physics-from-einsteins-legacy/