A Set-Theoretic Metaphysics for Quantum Mechanics

• URL: http://arxiv.org/abs/2309.14004v1
• Date: Mon, 25 Sep 2023 10:12:21 GMT
• Title: A Set-Theoretic Metaphysics for Quantum Mechanics
• Authors: Paul Tappenden
• Abstract summary: Set theory brought revolution to philosophy of mathematics and it can bring revolution to philosophy of physics too. All that stands in the way is the intuition that sets of physical objects cannot themselves be physical objects. Overturning that assumption opens the way to construing an object in superposition in an observers environment as a set of objects in definite states.
• Score: 0.0
• License: http://creativecommons.org/licenses/by/4.0/
• Abstract: Set theory brought revolution to philosophy of mathematics and it can bring revolution to philosophy of physics too. All that stands in the way is the intuition that sets of physical objects cannot themselves be physical objects, which appears to depend on the ubiquitous assumption that it is possible for there to exist numerically distinct observers in qualitatively identical mental states. Overturning that assumption opens the way to construing an object in superposition in an observers environment as a set of objects in definite states. The components of the superposition are subsets for which all the elements are in the same definite state. So an environmental z-spin-up electron becomes a set of elemental electrons each of which has definite spin for one orientation but lacks indefinite spin for other orientations. The environmental z-spin-up electron has subsets of elemental electrons for every orientation but it is only the subset with spins on the z-axis for which all the elements of the subset have the same value, namely spin-up. The subset of elemental electrons with spins on the x-axis has subsets of spin-up and spin-down elemental electrons of equal measure. Observers only detect the spins of environmental electrons, not those of elemental electrons.

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