Operational Coherent Measurements with Steering and Randomness

[2511.09102] Operational Coherent Measurements with Steering and Randomness Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Quantum Physics arXiv:2511.09102 (quant-ph) [Submitted on 12 Nov 2025 ( v1 ), last revised 22 Jun 2026 (this version, v3)] Title: Operational Coherent Measurements with Steering and Randomness Authors: Chellasamy Jebarathinam , Huan-Yu Ku , Hsi-Sheng Goan View a PDF of the paper titled Operational Coherent Measurements with Steering and Randomness, by Chellasamy Jebarathinam and 2 other authors View PDF HTML (experimental) Abstract: Measurement incompatibility underpins randomness generation in nonlocal phenomena. However, at its root, a more fundamental quantum feature is noncommuting (or coherent) measurements. This raises a central question: How can we operationally characterize the quantum advantage of coherent measurements within nonlocal correlations? We answer this by demonstrating that coherent measurements can leverage semi-device-independent (SDI) steering, enabling local randomness generation from any set of coherent measurements. Specifically, we establish that a measurement assemblage can be used to demonstrate SDI steering if and only if it is coherent, providing a complete operational characterization. To provide an application of this operational characterization, we formulate a nonconvex resource theory for SDI steering and propose an operational monotone for the two-setting scenario by mapping noncommuting measurements to SDI steering. Our framework enables a practical quantum random number generator based on SDI steering that eliminates the need to certify entanglement and tolerates arbitrarily low detection efficiency. That is, we demonstrate that genuine randomness can be generated via coherent measurements beyond standard steerable states and even beyond entangled states under realistic experimental conditions. These results extend the scope of quantum resources for generating nonlocal correlations beyond measurement incompatibility, revealing the operational power of coherent measurements. Comments: v3: 11 pages, 2 figures. Accepted for publication in Physical Review Research this https URL Subjects: Quantum Physics (quant-ph) Cite as: arXiv:2511.09102 [quant-ph] (or arXiv:2511.09102v3 [quant-ph] for this version) https://doi.org/10.48550/arXiv.2511.09102 Focus to learn more arXiv-issued DOI via DataCite Journal reference: Phys. Rev. Research 8, 033054 (2026) Related DOI : https://doi.org/10.1103/f2hj-hjlw Focus to learn more DOI(s) linking to related resources Submission history From: Jebarathinam Chellasamy Dr [ view email ] [v1] Wed, 12 Nov 2025 08:21:52 UTC (76 KB) [v2] Fri, 6 Mar 2026 06:43:20 UTC (98 KB) [v3] Mon, 22 Jun 2026 02:07:04 UTC (78 KB) Full-text links: Access Paper: View a PDF of the paper titled Operational Coherent Measurements with Steering and Randomness, by Chellasamy Jebarathinam and 2 other authors View PDF HTML (experimental) TeX Source view license Current browse context: quant-ph < prev | next > new | recent | 2025-11 References & Citations INSPIRE HEP NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... 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