Optimal measurement of field properties with quantum sensor networks.

ABSTRACT: We consider a quantum sensor network of qubit sensors coupled to a field f ( x ; θ ) analytically parameterized by the vector of parameters θ . The qubit sensors are fixed at positions x ₁, …, x _d . While the functional form of f ( x ; θ ) is known, the parameters θ are not. We derive saturable bounds on the precision of measuring an arbitrary analytic function q( θ ) of these parameters and construct the optimal protocols that achieve these bounds. Our results are obtained from a combination of techniques from quantum information theory and duality theorems for linear programming. They can be applied to many problem

SUBMITTER: Qian T 

PROVIDER: S-EPMC9793443 | biostudies-literature | 2021 Mar

REPOSITORIES: biostudies-literature