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But it hasn’t worked out that way the more we do experiments, and the more we understand the inner workings of quantum mechanics, the more it seems like the wave function really exists. That was the original hope of people like Albert Einstein. It’s natural to think that there really is some answer to how the electron is spinning, but we just don’t know what it is, and the wave function encapsulates our ignorance. We can use the wave function to calculate the probability of each measurement outcome. Physicists describe the state of the electron in terms of a “wave function,” which tells us how much of the state of the electron is spin-up, and how much is spin-down. We can prepare the electron in a “superposition” of spin-up and spin-down, such that there will be some probability of observing each outcome. That would be weird enough as it is – why only two possible answers? But even weirder is that we can’t always predict what that measurement outcome is going to be. When we measure its spin, we get only one of two possible answers: it’s spinning up or down, with respect to whatever axis we used to measure it. Consider an electron, which is an elementary particle that has a certain fixed amount of a quantity called spin. To see why, we have to think about how quantum mechanics works. (Not everyone agrees with me about this.) The many worlds of quantum mechanics, I would argue, are probably there. And they arise naturally from the simplest version of our most solidly tested physical theory, quantum mechanics.
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They are not far away – but only because they aren’t “located” anywhere at all. The multiple “worlds” of quantum mechanics are something else entirely. It may very well exist, but the only thing to say right now is that we don’t really know. But exactly because those ideas are themselves speculative, the cosmological multiverse should be thought of as speculative-squared. It arises naturally as a consequence of other speculative ideas, including string theory and cosmological inflation. The cosmological multiverse wasn’t invented because physicists thought it would be cool to have a bunch of universes out there. Dead and alive: why it's time to rethink quantum physics.Quantum field theory: "An unholy crossbreed between quantum physics in a bad mood and every button you never push on a calculator".Strange and the Multiverse of Madness-for bringing the mind-bending “multiverse” to your attention. But for now, credit comic-book cinema-like the upcoming 2022 film Dr. Someday, he says, quantum computing may be powerful enough to actually test whether it exists. “If the multiverse is real, then branches happen all the time,” says Yalinewich. The theory tries to explain the behaviour of subatomic particles, which can simultaneously exist in different locations at the same time. Many modern physicists think about a multiverse in the context of the “many worlds” theory of quantum mechanics. READ: China’s mission to Mars opens a new phase of the space race But the idea of parallel universes does do a lot to “alleviate inconveniences” in scientific study, he explains, like theoretical time travel paradoxes. It’s a little closer to philosophy, says Almog Yalinewich, a postdoctoral fellow in astrophysics at the University of Toronto. Multiverse theory is not strictly “scientific” because, for now, it can’t be empirically tested. That might sound like science fiction or something straight out of the Marvel Cinematic Universe-and, hey, Carroll was a scientific consultant for Avengers: Endgame-but his work represents a legitimate if controversial school of thought in modern science. In each of the realities that his quantum computing spit out, there’s a different number printed in his book.
#Parallel universe theory generator
But that’s just one of more than a quadrillion numbers that his quantum random number generator could’ve produced-and Carroll claims that a new universe was created for each outcome. In our universe, each copy of the book shows that same number: 756,132,390,815,553. A random number is printed on the copyright page of theoretical physicist Sean Carroll’s 2019 book Something Deeply Hidden.