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Quantum Mechanics in a Nutshell
At the moment, there exists a loosely bundled canon of quantum rules subsumed under the term quantum mechanics or quantum theory. It includes reversible as well as irreversible processes, and is prima facie inconsistent. As already von Neumann [552, 554] and later Everett [30, 206, 545] noted, there cannot be any irreversible measurement process nested in a ubiquitous uniformly reversible evolution of the quantum state. Both von Neumann and Everett called the former, irreversible, discontinuousdoi:10.1007/978-3-319-70815-7_12 fatcat:uhdtagzasrge3ayz4jiqumep34