Approaching the Ultimate Limit of Quantum Multiparameter Estimation by Many-Body Physics
arXiv:2603.17955 · doi:10.1103/cghv-j44h
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.
10 pages including end matter and supplemental material, 2 figures. v3: accepted version, elaborated on the imaging example and the general-dyne measurement