Spectroscopy on a single nonlinear mode recognizes quantum states

Quantum Physics arXiv:2511.16945 (quant-ph) [Submitted on 21 Nov 2025] Title:Spectroscopy on a single nonlinear mode recognizes quantum states Authors:Wouter Verstraelen, Stanisław Świerczewski, Andrzej Opala, Andrew Haky, Matteo Gadani, Huawen Xu, Oleksandr Kyriienko, Michał Matuszewski, Alberto Bramati, Timothy C.H. Liew View a PDF of the paper titled Spectroscopy on a single nonlinear mode recognizes quantum states, by Wouter Verstraelen and 9 other authors View PDF HTML (experimental) Abstract:Characterising optical quantum states is essential for the development of quantum technologies. While traditional approaches to perform full quantum state tomography are often experimentally demanding, neuromorphic architectures may provide an effective alternative. In this work, we demonstrate how a quantum nonlinear driven-dissipative mode is sufficient to act as a quantum reservoir. By analyzing the occupations at different frequencies in the emission spectrum, a linear regression suffices in many cases to recognize the relevant parameters of incident squeezed states. Beyond highlighting the general potential of this approach under continuous driving, we illustrate its effectiveness in an explicit nontrivial example where the source is a degenerate optical parametric oscillator (OPO), coupled to a nonlinear polariton microcavity. Subjects: Quantum Physics (quant-ph); Disordered Systems and Neural Networks (cond-mat.dis-nn); Optics (physics.optics) Cite as: arXiv:2511.16945 [quant-ph] (or arXiv:2511.16945v1 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2511.16945 Focus to learn more arXiv-issued DOI via DataCite (pending registration) Submission history From: Wouter Verstraelen [view email] [v1] Fri, 21 Nov 2025 04:42:53 UTC (1,519 KB) Full-text links: Access Paper: View a PDF of the paper titled Spectroscopy on a single nonlinear mode recognizes quantum states, by Wouter Verstraelen and 9 other authorsView PDFHTML (experimental)TeX Source view license Current browse context: quant-ph new | recent | 2025-11 Change to browse by: cond-mat cond-mat.dis-nn physics physics.optics 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?)