3 papers
quant-ph2026
Unified and computable approach to optimal strategies for multiparameter estimation
Zhao-Yi Zhou, Da-Jian Zhang
Precise estimation of physical parameters underpins both scientific discovery and technological development. A central goal of quantum metrology and sensing is to exploit quantum r…
quant-ph2025
Retrieving maximum information of symmetric states from their corrupted copies
Zhao-Yi Zhou, Da-Jian Zhang
Using quantum measurements to extract information from states is a matter of routine in quantum science and technologies. A recent work [Phys. Rev. Lett. 133, 040202 (2024)] report…
quant-ph2024
Strict hierarchy of optimal strategies for global estimations: Linking global estimations with local ones
Zhao-Yi Zhou, Jing-Tao Qiu, Da-Jian Zhang
A crucial yet challenging issue in quantum metrology is to ascertain the ultimate precision achievable in estimation strategies. While there are two paradigms of estimations, local…