ArticleScientific reports2026
Coherent quantum noise cancellation for torque sensing using auxiliary coupled Laguerre-Gaussian optorotational cavity.
Article in Scientific reports, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
This work introduces a quantum-enhanced torque sensing methodology utilizing coherent quantum noise cancellation (CQNC) within a hybrid optomechanical architecture termed the auxiliary coupled Laguerre-Gaussian (LG) optorotational cavity. The setup comprises a primary rotational cavity supporting an LG optical mode interacting with a rotating mirror, alongside an auxiliary op- tical resonator embedding an effective two-level atomic ensemble that emulates a negative mass oscillator. Photon-hopping mediated inter-cavity coupling facilitates phase-coherent energy exchange, enabling engineered interference pathways that mitigate quantum back-action noise-the principal quantum limit in precision torque transduction. Through analytical derivation and spectral response analysis, we demonstrate that this configuration facilitates torque sensitivity surpassing the standard quantum limit (SQL) across a wide frequency band. The integration of heterodyne CQNC offers a tunable detection bandwidth, positioning the system as a strong candidate for high-precision metrology and quantum-limited force sensing applications. These results pave the way for developing advanced quantum torque sensors, thereby furthering both theoretical research and practical measurement methodologies.
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