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Abstract: It is now widely accepted that environmental entanglement and the resultingdecoherence processes play a crucial role in the quantum-to-classicaltransition and the emergence of -classicality- from quantum mechanics. To thisextent, decoherence is often understood as signifying a break with theCopenhagen interpretation, and in particular with Bohr-s view of theindispensability of classical concepts. This paper analyzes the relationshipbetween Bohr-s understanding of the quantum-classical divide and his doctrineof classical concepts and the decoherence-based program of emergentclassicality. By drawing on Howard-s reconstruction of Bohr-s doctrine ofclassical concepts, and by paying careful attention to a hitherto overlookeddisagreement between Heisenberg and Bohr in the 1930s about the placement ofthe quantum-classical -cut,- we show that Bohr-s view of the quantum-classicaldivide can be physically justified by appealing to decoherence. We also discussearly anticipations of the role of the environment in the quantum-classicalproblem in Heisenberg-s writings. Finally, we distinguish four differentformulations of the doctrine of classical concepts in an effort to present amore nuanced assessment of the relationship between Bohr-s views anddecoherence that challenges oversimplified statements frequently found in theliterature.



Autor: Maximilian Schlosshauer, Kristian Camilleri

Fuente: https://arxiv.org/







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