Weinert, Friedel
(2025)
The Propensity Approach to Quantum Systems.
[Preprint]
Abstract
The purpose of this paper is to revisit a neglected understanding of quantum mechanics, the so-called propensity theory and to propose a amended version of it. According to this version, the causal-structural approach adopted here, a quantum system has a physical structure, consisting of relata (components, say electrons) and relations (determining the interrelations between the components). This structure is mathematically encoded in wave functions and forms the base, on which propensities supervene. This paper proposes that propensities or intrinsic dispositions supervene on the structural properties of the system. A propensity is a disposition of a quantum system to display selective aspects in response to an encounter with a measurement situation. The selective propensities manifest themselves as probabilities, in accordance with the application of the Born rule to respective wave functions.
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