Robust cavity metrology beyond the limits of Pound-Drever-Hall

Quantum Physics arXiv:2608.21512 (quant-ph) [Submitted on 21 Aug 2026] Title:Robust cavity metrology beyond the limits of Pound-Drever-Hall Authors:Ibukunoluwa Adisa, Won Chan Lee, Yanqin Huang, Nathan Schine, Kevin C. Cox, Alicia J. Kollár View a PDF of the paper titled Robust cavity metrology beyond the limits of Pound-Drever-Hall, by Ibukunoluwa Adisa and 5 other authors View PDF HTML (experimental) Abstract:Precise measurement of the resonance frequencies of microwave and optical cavities is a foundational capability across quantum technologies. One of the highest-performance methods currently available is Pound-Drever-Hall (PDH) spectroscopy, which relies on a three-tone interrogation and eliminates sensitivity to path-length fluctuations. However, PDH is known to suffer from systematic offsets due to residual amplitude modulation and demodulation-phase errors. Here we leverage an optimal linear combination of the phases of the three interrogation tones to implement a method for robust cavity metrology which eliminates significant systematic-error sensitivities of PDH. We experimentally demonstrate robust cavity measurements in both the optical and microwave frequency regime, showing insensitivity to sideband imbalance and demodulation phase, as well as demonstrating single-shot readout of a cavity-coupled superconducting qubit. Comments: Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2608.21512 [quant-ph] (or arXiv:2608.21512v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2608.21512 Focus to learn more arXiv-issued DOI via DataCite Submission history From: Ibukunoluwa Adisa [view email] [v1] Fri, 21 Aug 2026 18:00:01 UTC (1,317 KB) Full-text links: Access Paper: View a PDF of the paper titled Robust cavity metrology beyond the limits of Pound-Drever-Hall, by Ibukunoluwa Adisa and 5 other authorsView 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?)