Author(s): Lingna Wang, Hongzhen Chen, and Haidong Yuan A fundamental challenge in multiparameter quantum estimation arises from the incompatibility of optimal measurements for different parameters, leading to intricate precision trade-offs that obscure the understanding of ultimate quantum limits. Here, we present an approach that precisely quantifies t… [Phys. Rev. Lett. 137, 020804] Published Wed Jul 08, 2026