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arXiv:2110.15471quant-ph

Decoherent Histories Quantum Mechanics and Copenhagen Quantum Mechanics

Murray Gell-Mann, James B Hartle

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Abstract

This paper discusses the relation between the decoherent histories approach to quantum mechanics that is based on coarse-grained decoherent histories of a closed system, and the approximate quantum mechanics of measured subsystems, as in the Copenhagen interpretation. We show how the a classical world used in such formulations is not to something to be postulated but rather explained by suitable sets of alternative histories of quasiclassical variables. We discuss the general definition of measurement, the collapse of the wave function, and irreversibility from the perspective of decoherent histories quantum theory..

arXiv comments
4 pages. arXiv admin note: substantial text overlap with arXiv:quant-ph/0609190, arXiv:2012.05229
Journal reference
DOI
Subjects
quant-phQuantum Physics gr-qcGeneral Relativity and Quantum Cosmology physics.hist-phHistory and Philosophy of Physics

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    • See https://en.wikipedia.org/wiki/Consistent_histories and the last paper from Murray Gell-Mann (published posthumously) https://arxiv.org/abs/2110.15471

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