Dynamics of ideal quantum measurement of a spin 1 with a Curie-Weiss magnet
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Quantum Physics arXiv:2603.07153 (quant-ph) [Submitted on 7 Mar 2026] Title:Dynamics of ideal quantum measurement of a spin 1 with a Curie-Weiss magnet Authors:Theodorus Maria Nieuwenhuizen View a PDF of the paper titled Dynamics of ideal quantum measurement of a spin 1 with a Curie-Weiss magnet, by Theodorus Maria Nieuwenhuizen View PDF HTML (experimental) Abstract:Quantum measurement is a dynamical process of an apparatus coupled to a test system. Ideal measurement of the $z$-component of a spin-$\frac{1}{2}$ ($s_z=\pm\frac{1}{2}$) has been modeled by the Curie-Weiss model for quantum measurement. Recently, the model was generalized to higher spin and the thermodynamics was solved. Here the dynamics is considered. To this end, the dynamics for spin-$\frac{1}{2}$ case are cast in general notation. The dynamics of the measurement of the $z$-component of a spin-1 ($s_z=0,\pm 1$) are solved in detail and evaluated numerically. Energy costs of the measurement, which are macroscopic, are evaluated. Generalization to higher spin is straightforward. Comments: Subjects: Quantum Physics (quant-ph); Other Condensed Matter (cond-mat.other) Cite as: arXiv:2603.07153 [quant-ph] (or arXiv:2603.07153v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2603.07153 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Journal reference: Frontiers in Quantum Science and Technology 4, 1603372 (2025) Related DOI: https://doi.org/10.3389/frqst.2025.1603372 Focus to learn more DOI(s) linking to related resources Submission history From: Th. M. Nieuwenhuizen [view email] [v1] Sat, 7 Mar 2026 11:29:32 UTC (556 KB) Full-text links: Access Paper: View a PDF of the paper titled Dynamics of ideal quantum measurement of a spin 1 with a Curie-Weiss magnet, by Theodorus Maria NieuwenhuizenView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-03 Change to browse by: cond-mat cond-mat.other 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?) Links to Code Toggle Papers with Code (What is Papers with Code?) 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?)