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The Case for the Everett Multiverse

David Wallace
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⚡ Quantum Brief
David Wallace argues in a new arXiv paper that quantum mechanics, as currently practiced, must be interpreted through the many-worlds or Everettian framework to fully account for its empirical predictions. The paper, submitted on August 7, 2026, contends that alternative interpretations fail to replicate the theory’s complete observational content. Wallace’s non-technical presentation, part of an upcoming Blackwell Companion volume, positions the Everett multiverse as the only viable interpretation that preserves quantum mechanics’ predictive power without additional assumptions.
Why it matters

This challenges the dominance of Copenhagen-style interpretations, suggesting that many-worlds may be the only framework that fully aligns with quantum theory’s empirical success, reshaping foundational debates in quantum mechanics.

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Quantum Physics arXiv:2608.07706 (quant-ph) [Submitted on 7 Aug 2026] Title:The Case for the Everett Multiverse Authors:David Wallace View a PDF of the paper titled The Case for the Everett Multiverse, by David Wallace View PDF HTML (experimental) Abstract:I give a non-technical presentation of the argument that quantum mechanics, in the form in which it is currently used, needs to be understood in many-worlds (Everettian) terms; the alternatives that have been discussed are at present not able to reproduce the full empirical content of the theory. This is a draft of a chapter for the forthcoming \emph{Blackwell Companion to Philosophy and the Multiverse (Klaas Kraay and Daniel Rubio, eds.) } Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2608.07706 [quant-ph] (or arXiv:2608.07706v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2608.07706 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: David Wallace [view email] [v1] Fri, 7 Aug 2026 18:49:40 UTC (27 KB) Full-text links: Access Paper: View a PDF of the paper titled The Case for the Everett Multiverse, by David WallaceView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-08 References & Citations INSPIRE HEP NASA ADSGoogle Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... Data provided by: Bookmark Bibliographic Tools Bibliographic and Citation Tools Bibliographic Explorer Toggle Bibliographic Explorer (What is the Explorer?) Connected Papers Toggle Connected Papers (What is Connected Papers?) Litmaps Toggle Litmaps (What is Litmaps?) scite.ai Toggle scite Smart Citations (What are Smart Citations?) Code, Data, Media Code, Data and Media Associated with this Article alphaXiv Toggle alphaXiv (What is alphaXiv?) Links to Code Toggle CatalyzeX Code Finder for Papers (What is CatalyzeX?) DagsHub Toggle DagsHub (What is DagsHub?) GotitPub Toggle Gotit.pub (What is GotitPub?) Huggingface Toggle Hugging Face (What is Huggingface?) ScienceCast Toggle ScienceCast (What is ScienceCast?) Demos Demos Replicate Toggle Replicate (What is Replicate?) Spaces Toggle Hugging Face Spaces (What is Spaces?) Spaces Toggle TXYZ.AI (What is TXYZ.AI?) Related Papers Recommenders and Search Tools Link to Influence Flower Influence Flower (What are Influence Flowers?) Core recommender toggle CORE Recommender (What is CORE?) Author Venue Institution Topic About arXivLabs arXivLabs: experimental projects with community collaborators arXivLabs is a framework that allows collaborators to develop and share new arXiv features directly on our website. Both individuals and organizations that work with arXivLabs have embraced and accepted our values of openness, community, excellence, and user data privacy. arXiv is committed to these values and only works with partners that adhere to them. Have an idea for a project that will add value for arXiv's community? Learn more about arXivLabs. Which authors of this paper are endorsers? | Disable MathJax (What is MathJax?)

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