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Comment on "Determining angle of arrival of radio-frequency fields using subwavelength, amplitude-only measurements of standing waves in a Rydberg atom sensor"

arXiv Quantum Physics
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⚡ Quantum Brief
Physicists Chilcott and Kjærgaard challenge a prior study on Rydberg atom-based RF angle-of-arrival detection, arguing it overlooked critical RF transitions between sublevels in field-dressed atomic states. Their commentary, published January 2026, highlights how excluding these transitions skews spectral predictions when probing dressed Rydberg systems via electromagnetically induced transparency (EIT). The oversight may impact the accuracy of subwavelength RF sensing techniques, which rely on standing-wave measurements in atomic vapors for precision direction-finding applications. The authors emphasize that neglected transitions between magnetic sublevels alter the observed EIT spectrum, potentially compromising the sensor’s ability to resolve incident RF angles at subwavelength scales. This critique underscores the need for refined theoretical models in quantum-based RF metrology to ensure reliable real-world performance in emerging atomic sensor technologies.
Comment on "Determining angle of arrival of radio-frequency fields using subwavelength, amplitude-only measurements of standing waves in a Rydberg atom sensor"

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Quantum Physics arXiv:2601.20062 (quant-ph) [Submitted on 27 Jan 2026] Title:Comment on "Determining angle of arrival of radio-frequency fields using subwavelength, amplitude-only measurements of standing waves in a Rydberg atom sensor" Authors:M. Chilcott, N. Kjærgaard View a PDF of the paper titled Comment on "Determining angle of arrival of radio-frequency fields using subwavelength, amplitude-only measurements of standing waves in a Rydberg atom sensor", by M. Chilcott and N. Kj{\ae}rgaard View PDF HTML (experimental) Abstract:We discuss the consequence of excluding allowed RF-transition between substates of a field-dressed Rydberg manifold when predicting the spectrum that will be observed if the dressed system is probed in an optical EIT scheme. Comments: Subjects: Quantum Physics (quant-ph); Atomic Physics (physics.atom-ph) Cite as: arXiv:2601.20062 [quant-ph] (or arXiv:2601.20062v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2601.20062 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Niels Kjærgaard [view email] [v1] Tue, 27 Jan 2026 21:13:48 UTC (303 KB) Full-text links: Access Paper: View a PDF of the paper titled Comment on "Determining angle of arrival of radio-frequency fields using subwavelength, amplitude-only measurements of standing waves in a Rydberg atom sensor", by M. Chilcott and N. Kj{\ae}rgaardView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2026-01 Change to browse by: physics physics.atom-ph 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