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Studies in History and Philosophy of Science Part B Studies in History and Philosophy of Modern Physics

Self-induced decoherence: a new approach

Mario Castagnino, Olímpia Lombardi

Published Nov 24, 2003• 73 citations
Publisher
DOI
10.1016/j.shpsb.2003.03.001

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In this paper we argue that the emergence of the classical world from the underlying quantum reality involves two elements: self-induced decoherence and macroscopicity. Self-induced decoherence does not require the openness of the system and its interaction with the environment: a single closed system can decohere when its Hamiltonian has continuous spectrum. We show that, if the system is macroscopic enough, after self-induced decoherence it can be described as an ensemble of classical distributions weighted by their corresponding probabilities. We also argue that classicality is an emergent property that arises when the behavior of the system is described from an observational perspective.