In the study of quantum limits to parameter estimation, the high dimensionality of the density
operator and that of the unknown parameters have long been two of the most difficult …

We derive fundamental bounds on the maximal achievable precision in multiparameter
noisy quantum metrology, valid under the most general entanglement-assisted adaptive …

We provide the optimal measurement strategy for a class of noisy channels that reduce to
the identity channel for a specific value of a parameter (spreading channels). We provide an …