3 papers
quant-ph2025
Orders matter: tight bounds on the precision of sequential quantum estimation for multiparameter models
Gabriele Fazio, Jiayu He, Matteo G. A. Paris
In multiparameter quantum metrology, the ultimate precision of joint estimation is dictated by the Holevo Cramér-Rao bound. In this paper, we discuss and analyze in detail an alte…
quant-ph2025
Weight-dependent and weight-independent measures of quantum incompatibility in multiparameter estimation
Jiayu He, Gabriele Fazio, Matteo G. A. Paris
Multiparameter quantum estimation faces a fundamental challenge due to the inherent incompatibility of optimal measurements for different parameters, a direct consequence of quantu…
quant-ph2025
Cartan Quantum Metrology
Gabriele Fazio, Jiayu He, Matteo G. A. Paris
We address the characterization of two-qubit gates, focusing on bounds to precision in the joint estimation of the three parameters that define their Cartan decomposition. We deriv…