5 papers · 1 filter
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…
Krylov shadow tomography: Efficient estimation of quantum Fisher information
Da-Jian Zhang, D. M. Tong
Efficiently estimating the quantum Fisher information (QFI) is pivotal in quantum information science but remains an outstanding challenge for large systems due to its high nonline…
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…
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…
Inferring physical properties of symmetric states from the fewest copies
Da-Jian Zhang, D. M. Tong
Learning physical properties of high-dimensional states is crucial for developing quantum technologies but usually consumes an exceedingly large number of samples which are difficu…