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LIT-100: Quantum States for Primitive Ontologists: A Case Study

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Properties5
StatusActive — read in full 2026-09-26 (NOTE-110); worth reading. It is short, it originated the dispositionalist reading, and the particle-in-a-box counterexample and the analysis of the costs of ψ-as-law are still the points the later literature (LIT-204, LIT-200, LIT-164) cites.
Version2
Tagsquantum-foundations, philosophy-of-science, metaphysics
Cited as “paper” byNOTE-110 — Belot — Quantum states for primitive ontologists
Cited as “source” byTHEORY-635 — If the quantum state of a Bohmian system is identified with the velocity dispositions it induces on the particles, inequivalent states can share one dispositional history: every energy eigenstate of a free particle in a box induces zero velocity everywhere, so the reading erases differences of energy and of typicality unless the map from states to velocity fields is injective for generic solutions, which is conjectured, not proved, THEORY-669 — Reading the universal quantum state as nomological escapes the costs of reading it as a field only by paying in the theory of laws: on the strong reading, modelled on the classical Hamiltonian, a time-dependent ψ makes laws time-indexed unless the universal state is time-independent, as Wheeler–DeWitt would make it; on the weak and functionalist readings ψ need be neither unique nor time-independent, but only within an extended Humeanism whose criterion would equally make classical fields nomological

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Gordon Belot (2011), European Journal for Philosophy of Science 2(1), 67–83 (2012) — DOI-10.1007/s13194-011-0024-8

Key takeaways

  • Primitive-ontology versions of Bohmian mechanics are dualistic, and none of the natural ways of placing the quantum state in a familiar category (field on configuration space, multi-field, law, or a history of dispositional properties) is free of serious costs. The multi-field view is the most plausible by orthodox standards, but Belot prefers to keep the alternatives open as a matter of van Fraassen-style interpretation.

Seeded from the abstract and a skim, before the reading in NOTE-110. What follows is what the work says about itself.

On primitive-ontology approaches, such as some Bohmian and spontaneous-collapse theories, describing a quantum system’s history attributes properties to regions of spacetime. This promises an easy link to ordinary macroscopic bodies. But these approaches are dualistic, positing a quantum state alongside the material degrees of freedom. Belot sets out and compares the primitive ontologist’s options for understanding that quantum state.

Standing in the record

Filed from the 2026-09-26 sweep of the papers-feed tracker for philosophy: 0 seconds of active reading over 0 sessions. It was filed Deferred, unread. NOTE-110 is the close reading of 2026-09-26, and it placed the work: Active — worth reading. It is short, it originated the dispositionalist reading, and the particle-in-a-box counterexample and the analysis of the costs of ψ-as-law are still the points the later literature (LIT-204, LIT-200, LIT-164) cites.

When seeded, before the reading in NOTE-110, the entry gave a priority for a deeper reading: medium — a short, sharp paper that the skim largely captures (t=0, never opened). It is load-bearing for the ψ-as-law debate.

What the seeding asked a deeper reading to check (NOTE-110 is that reading):

  • A careful comparative case study for the wave-function cluster, closely paralleling Chen’s taxonomy (LIT-204). His objections to ψ-as-law are ones Allori (LIT-200) must answer.
  • The particle-in-a-box counterexample to dispositional readings bears on Dorato’s powers-of-events view (LIT-176) and on Esfeld’s holistic dispositions.
  • His closing remark on the aims of interpretation (truth versus understanding) is a methodological point worth recording.

Access when seeded: The captured PhilArchive URL (BELQSF) sits behind Cloudflare and was not fetched. I identified the journal version through Crossref, which gives DOI 10.1007/s13194-011-0024-8, EJPS 2(1) 67–83, online 2011-02-08, and a title without the subtitle. I read the preprint “DemiChesterFinal.pdf” (16 pp., “Forthcoming in European Journal for Philosophy of Science”) from PhilSci-Archive 8468, deposited 2011-01-25, which I used as first appearance. Keywords are that record’s. The title’s subtitle follows the preprint and PhilPapers. Page numbers are the preprint’s.

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