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Redundancy from Subsystem Thermalization

arXiv Quantum Physics
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⚡ Quantum Brief
Xiangyu Cao and Zohar Nussinov demonstrate that quantum redundancy—the correlation between a system and environment fractions—can persist even as the environment thermalizes, challenging prior assumptions about decoherence. Their research shows this persistence stems from an initial "broadcasting" interaction altering a conserved quantity’s density, enabling classical behavior to emerge despite thermal noise. The study quantifies mutual information between the system and environment fractions using the large deviation principle, linking quantum information theory to statistical mechanics. Published in March 2026, the work bridges quantum physics and thermodynamics, offering new insights into how classical reality arises from quantum systems. This framework may advance error correction in quantum computing by explaining how information survives thermalization in noisy environments.
Redundancy from Subsystem Thermalization

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Quantum Physics arXiv:2603.15743 (quant-ph) [Submitted on 16 Mar 2026] Title:Redundancy from Subsystem Thermalization Authors:Xiangyu Cao, Zohar Nussinov View a PDF of the paper titled Redundancy from Subsystem Thermalization, by Xiangyu Cao and 1 other authors View PDF HTML (experimental) Abstract:In the theory of decoherence, redundancy is the correlation between a quantum system and fractions of the environment. It underlies the emergence of classical behavior. We show that redundancy can persist despite thermalizing dynamics in the environment. This follows an initial broadcasting interaction that changes the density of a conserved quantity. The mutual information between the system and a fraction of the environment is estimated using the large deviation principle governing subsystem thermalization. Comments: Subjects: Quantum Physics (quant-ph); Statistical Mechanics (cond-mat.stat-mech) Cite as: arXiv:2603.15743 [quant-ph] (or arXiv:2603.15743v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2603.15743 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Xiangyu Cao [view email] [v1] Mon, 16 Mar 2026 18:00:03 UTC (803 KB) Full-text links: Access Paper: View a PDF of the paper titled Redundancy from Subsystem Thermalization, by Xiangyu Cao 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