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Conjugate measurements, equilibration and emergent classicality

arXiv Quantum Physics
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⚡ Quantum Brief
Researchers from India propose a mechanism where environmental measurements of conjugate quantum observables (like position/momentum) induce simultaneous decoherence, bridging quantum mechanics and classical statistical physics. The study demonstrates how this process generates a uniform phase space probability density, effectively creating a classical equilibrium state from quantum dynamics without external thermal reservoirs. Published in Physics Letters A (March 2026), the work links open quantum systems to emergent classicality, offering a potential resolution to the quantum-to-classical transition paradox. The authors argue that continuous environmental monitoring of conjugate variables—rather than random noise—drives equilibration, challenging traditional decoherence models reliant on thermal interactions. This framework may explain classical behavior in macroscopic systems while preserving quantum coherence at microscopic scales, with implications for quantum thermodynamics and foundational physics.
Conjugate measurements, equilibration and emergent classicality

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Quantum Physics arXiv:2603.26333 (quant-ph) [Submitted on 27 Mar 2026] Title:Conjugate measurements, equilibration and emergent classicality Authors:S. Adarsh, P.N. Bala Subramanian, Sreeraj T. P View a PDF of the paper titled Conjugate measurements, equilibration and emergent classicality, by S. Adarsh and 1 other authors View PDF HTML (experimental) Abstract:Simultaneous decoherence of conjugate observables of an open quantum system leads to a classical statistical mechanical description with constant phase space probability density in terms of a uniform ensemble. We investigate a scenario where this may be realized by measurement of basic conjugate observables of a quantum system by the environment. Subjects: Quantum Physics (quant-ph); Statistical Mechanics (cond-mat.stat-mech) Cite as: arXiv:2603.26333 [quant-ph] (or arXiv:2603.26333v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2603.26333 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Journal reference: revised version published in Physics Letters A, 583 (2026)131604 Related DOI: https://doi.org/10.1016/j.physleta.2026.131604 Focus to learn more DOI(s) linking to related resources Submission history From: Sreeraj T P [view email] [v1] Fri, 27 Mar 2026 11:56:02 UTC (364 KB) Full-text links: Access Paper: View a PDF of the paper titled Conjugate measurements, equilibration and emergent classicality, by S. Adarsh and 1 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-03 Change to browse by: cond-mat cond-mat.stat-mech 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?)

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Source: arXiv Quantum Physics