Topological Sensing in the Dynamics of Quantum Walks with Defects
Summarize this article with:
Quantum Physics arXiv:2601.03821 (quant-ph) [Submitted on 7 Jan 2026] Title:Topological Sensing in the Dynamics of Quantum Walks with Defects Authors:Xiaowei Tong, Xingze Qiu, Xiang Zhan, Quan Lin, Kunkun Wang, Franco Nori, Peng Xue View a PDF of the paper titled Topological Sensing in the Dynamics of Quantum Walks with Defects, by Xiaowei Tong and 6 other authors View PDF HTML (experimental) Abstract:Topological quantum sensing leverages unique topological features to suppress noise and improve the precision of parameter estimation, emerging as a promising tool in both fundamental research and practical application. In this Letter, we propose a sensing protocol that exploits the dynamics of topological quantum walks incorporating localized defects. Unlike conventional schemes that rely on topological protection to suppress disorder and defects, our protocol harnesses the evolution time as a resource to enable precise estimation of the defect parameter. By utilizing topologically nontrivial properties of the quantum walks, the sensing precision can approach the Heisenberg limit. We further demonstrate the performance and robustness of the protocol through Bayesian estimation. Our results show that this approach maintains high precision over a broad range of parameters and exhibits strong robustness against disorder, offering a practical pathway for topologically enhanced quantum metrology. Comments: Subjects: Quantum Physics (quant-ph); Mesoscale and Nanoscale Physics (cond-mat.mes-hall) Cite as: arXiv:2601.03821 [quant-ph] (or arXiv:2601.03821v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2601.03821 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Journal reference: Phys. Rev. B, 112, L241116 (2025) Related DOI: https://doi.org/10.1103/3jtm-nxt4 Focus to learn more DOI(s) linking to related resources Submission history From: Kunkun Wang [view email] [v1] Wed, 7 Jan 2026 11:30:07 UTC (3,506 KB) Full-text links: Access Paper: View a PDF of the paper titled Topological Sensing in the Dynamics of Quantum Walks with Defects, by Xiaowei Tong and 6 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-01 Change to browse by: cond-mat cond-mat.mes-hall 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?)