8 papers · 1 filter
Dose-efficient Quantum Phase Estimation in Lossy Optical Interferometry
Qilin Yu, Ben Wang, Kaimin Zheng +3
Optical interferometry is a cornerstone technique for precise phase measurements across various fields. In many applications, for example, biological imaging, it often necessitates…
Experimental Joint Estimation of Phase and Phase Diffusion via Deterministic Bell Measurements
Ben Wang, Minghao Mi, Huangqiuchen Wang +2
Accurate phase estimation plays a pivotal role in quantum metrology, yet its precision is significantly affected by noise, particularly phase-diffusive noise caused by phase drift.…
Approaching the Multiparameter Quantum Cramér-Rao Bound via Classical Correlation and Entangling Measurements
Minghao Mi, Ben Wang, Lijian Zhang
Multiparameter quantum metrology is essential for a wide range of practical applications. However, simultaneously achieving the ultimate precision for all parameters, as prescribed…
A Geometric Quantum Speed Limit: Theoretical Insights and Photonic Implementation
Qianyi Wang, Ben Wang, Jun Wang +1
Quantum mechanics imposes a lower bound on the time required for a quantum system to reach certain given targets. In this paper, from a geometric perspective, we introduce a new qu…
Quantum Geometric Tensor for Mixed States Based on the Covariant Derivative
Qianyi Wang, Ben Wang, Jun Wang +1
The quantum geometric tensor (QGT) is a fundamental quantity for characterizing the geometric properties of quantum states and plays an essential role in elucidating various physic…
Variational Graphical Quantum Error Correction Codes
Yuguo Shao, Yong-Chang Li, Fuchuan Wei +5
Quantum error correction is essential for achieving fault-tolerant quantum computation. However, most typical quantum error-correcting codes are designed for generic noise models,…