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Decoherent Histories Quantum Mechanics and Copenhagen Quantum Mechanics
Murray Gell-Mann, James B Hartle
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 ap…
Alternative Decohering Histories in Quantum Mechanics
Murray Gell-Mann, James Hartle
We continue our efforts to understand, within the framework of the quantum mechanics of the universe as a whole, the quasiclassical realm of familiar experience as a feature emerge…
Adaptive Coarse Graining, Environment, Strong Decoherence, and Quasiclassical Realms
Murray Gell-Mann, James B. Hartle
Three ideas are introduced that when brought together characterize the realistic quasiclassical realms of our quantum universe as particular kinds of sets of alternative coarse-gra…
Decoherent Histories Quantum Mechanics with One 'Real' Fine-Grained History
Murray Gell-Mann, James B. Hartle
Decoherent histories quantum theory is reformulated with the assumption that there is one "real" fine-grained history, specified in a preferred complete set of sum-over-histories v…
Quasiclassical Coarse Graining and Thermodynamic Entropy
Murray Gell-Mann, James Hartle
Our everyday descriptions of the universe are highly coarse-grained, following only a tiny fraction of the variables necessary for a perfectly fine-grained description. Coarse grai…