Direct estimation of arbitrary observables of an oscillator

[2503.10436] Direct estimation of arbitrary observables of an oscillator Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Quantum Physics arXiv:2503.10436 (quant-ph) [Submitted on 13 Mar 2025 ( v1 ), last revised 23 Mar 2026 (this version, v2)] Title: Direct estimation of arbitrary observables of an oscillator Authors: Tanjung Krisnanda , Fernando Valadares , Kyle Timothy Ng Chu , Pengtao Song , Adrian Copetudo , Clara Yun Fontaine , Lukas Lachman , Radim Filip , Yvonne Y. Gao View a PDF of the paper titled Direct estimation of arbitrary observables of an oscillator, by Tanjung Krisnanda and 8 other authors View PDF HTML (experimental) Abstract: Quantum harmonic oscillators serve as fundamental building blocks for quantum information processing, particularly in the context of the bosonic circuit quantum electrodynamics (cQED) platform. Conventional methods for extracting oscillator properties rely on predefined analytical gate sequences to access a restricted set of observables or resource-intensive tomography processes. Here, we introduce the Optimized Routine for Estimation of any Observable (OREO), a numerically optimized protocol that maps the expectation value of arbitrary oscillator observables onto that of an ancillary qubit. We demonstrate OREO in a bosonic cQED system as a means to efficiently measure phase-space quadratures and their higher moments, directly obtain faithful non-Gaussianity ranks, and effectively achieve state preparation independent of initial conditions in the oscillator. These results position OREO as a valuable tool for direct and efficient information extraction from bosonic quantum states, unlocking new possibilities for measurement, control, and state preparation in continuous-variable quantum information processing. Comments: Main text: 5 pages with 4 figures. Supplemental material: 10 pages with 8 figures Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2503.10436 [quant-ph] (or arXiv:2503.10436v2 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2503.10436 Focus to learn more arXiv-issued DOI via DataCite Journal reference: Physical Review Research 8, 023026 (2026) Related DOI : https://doi.org/10.1103/72f2-tgwp Focus to learn more DOI(s) linking to related resources Submission history From: Tanjung Krisnanda [ view email ] [v1] Thu, 13 Mar 2025 14:58:21 UTC (1,902 KB) [v2] Mon, 23 Mar 2026 06:02:05 UTC (3,093 KB) Full-text links: Access Paper: View a PDF of the paper titled Direct estimation of arbitrary observables of an oscillator, by Tanjung Krisnanda and 8 other authors View PDF HTML (experimental) TeX Source view license Current browse context: quant-ph < prev | next > new | recent | 2025-03 References & Citations INSPIRE HEP NASA ADS Google 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? ) We gratefully acknowledge support from our major funders , member institutions , , and all contributors. About · Help · Contact · Subscribe · Copyright · Privacy · Accessibility · Operational Status (opens in new tab) Major funding support from

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