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arXiv · 2603.17955

Approaching the Ultimate Limit of Quantum Multiparameter Estimation by Many-Body Physics

Mankei Tsang
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Abstract

I propose a physical measurement scheme on multiple independent and identically distributed quantum objects to approach the Holevo--Nagaoka bound for quantum multiparameter estimation. The scheme entails a physical interaction of the objects with bosonic ancillas, followed by a general-dyne measurement of the ancillas. The proposal offers a more concrete description of the experimental setup needed to achieve the ultimate precision limit set by the bound.

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Mankei Tsang. 2026-03-18. Approaching the Ultimate Limit of Quantum Multiparameter Estimation by Many-Body Physics. https://doi.org/10.1103/cghv-j44h

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