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Self-Induced Decoherence and the Classical Limit of Quantum Mechanics

Published online by Cambridge University Press:  01 January 2022

Mario Castagnino  and
Olimpia Lombardi
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Abstract

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.

Type
Quantum Mechanics
Information
Philosophy of Science , Volume 72 , Issue 5: Proceedings of the 2004 Biennial Meeting of The Philosophy of Science Association. Part I: Contributed Papers , December 2005 , pp. 764 - 776
Copyright
Copyright © The Philosophy of Science Association

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