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LIT-204: Realism about the Wave Function

2 min read

Properties5
StatusActive — read in full 2026-09-26 (NOTE-175); worth reading as the compact map of the realist options and the hub for the wave-function cluster (LIT-200, LIT-100, LIT-164, LIT-121, LIT-176), with the caution that Table 1 is asserted, not derived, and is uneven in places.
Version2
Tagsquantum-foundations, philosophy-of-science, metaphysics
Cited as “paper” byNOTE-175 — Chen — Realism about the Wave Function
Cited as “source” byTHEORY-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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Eddy Keming Chen (2018), Philosophy Compass 14(7), e12611 (2019); preprint arXiv — ARXIV-1810.07010

Key takeaways

  • A realist about quantum mechanics has three families of options for what the wave function is — a physical object (ontological), something law-like (nomological), or an entity of its own kind (sui generis) — and which ones are available depends on the chosen solution to the measurement problem.

Seeded from the abstract and a skim, before the reading in NOTE-175. What follows is what the work says about itself.

Chen surveys how a realist should understand the wave function, the puzzling central object of quantum mechanics. Setting aside instrumentalist and epistemic readings, he sorts realist proposals into ontological interpretations, nomological interpretations, and a sui generis interpretation. The survey is confined to non-relativistic quantum mechanics and ties each option to the main solutions of the measurement problem.

Standing in the record

Filed from the 2026-09-26 sweep of the papers-feed tracker for philosophy: 20 seconds of active reading over 1 session. It was filed Deferred, unread. NOTE-175 is the close reading of 2026-09-26, and it placed the work: Active — worth reading as the compact map of the realist options and the hub for the wave-function cluster (LIT-200, LIT-100, LIT-164, LIT-121, LIT-176), with the caution that Table 1 is asserted, not derived, and is uneven in places.

When seeded, before the reading in NOTE-175, the entry gave a priority for a deeper reading: medium — a survey with a clear taxonomy that the skim largely captures; useful as the hub for the wave-function cluster, but t=20s.

What the seeding asked a deeper reading to check (NOTE-175 is that reading):

  • A compact map of the positions that LIT-121 (Gao), LIT-176 (Dorato), LIT-200 (Allori) and LIT-100 (Belot) take up; it could be the hub note for the wave-function cluster.
  • Check Table 1’s entries against the section texts; several cells are marked ”?”.
  • The “too cheap” objection to weak nomologism bears directly on Allori’s wave-functionalism (LIT-200).

Access when seeded: arXiv abs page (v1 submitted 13 Oct 2018; v2 12 Jun 2019, “penultimate version for Philosophy Compass”) and the full v2 PDF (22 pp.) read via text extraction; journal version (Wiley, online 2019-07-30 per Crossref) not opened.

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