Rejecting both von Neumann and Bohr, Everett came up with his own solution to the measurement problem. Rather than explaining wave function collapse, Everett stated that wave functions never collapse at all. This in itself was not new; Bohm said the same thing. But Bohm had also added particles with definite positions into the theory, which accounted for the outcomes of measurements. Everett didn’t add particles—he didn’t think he needed them. Instead, he insisted that a single universal wave function was all there was: a massive mathematical object describing the quantum states of all objects
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Everett. The many worlds interpretation of quantum physics.
