quantum metrology

Simultaneous measurement of multiple incompatible observables and tradeoff in multiparameter quantum estimation
How well can multiple incompatible observables be implemented by a single measurement? This is a fundamental problem in quantum …
Hongzhen Chen, Lingna Wang, Haidong Yuan
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Incompatibility measures in multiparameter quantum estimation under hierarchical quantum measurements
The incompatibility of the measurements constrains the achievable precisions in multiparameter quantum estimation. Understanding the …
Hongzhen Chen, Yu Chen, Haidong Yuan
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Information Geometry under Hierarchical Quantum Measurement
In most quantum technologies, measurements need to be performed on the parametrized quantum states to transform the quantum information …
Hongzhen Chen, Yu Chen, Haidong Yuan
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Optimal Scheme for Quantum Metrology
Quantum metrology can achieve far better precision than classical metrology, and is one of the most important applications of quantum …
Jing Liu, Mao Zhang, Hongzhen Chen, Lingna Wang, Haidong Yuan
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''Super-Heisenberg'' and Heisenberg Scalings Achieved Simultaneously in the Estimation of a Rotating Field
The Heisenberg scaling, which scales as N^-1 in terms of the number of particles or T^-1 in terms of the evolution time, serves as a …
Zhibo Hou, Yan Jin, Hongzhen Chen, Jun-Feng Tang, Chang-Jiang Huang, Haidong Yuan, Guo-Yong Xiang, Chuan-Feng Li, Guang-Can Guo
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Zero–trade-off multiparameter quantum estimation via simultaneously saturating multiple Heisenberg uncertainty relations
Quantum estimation of a single parameter has been studied extensively. Practical applications, however, typically involve multiple …
Zhibo Hou, Jun-Feng Tang, Hongzhen Chen, Haidong Yuan, Guo-Yong Xiang, Chuan-Feng Li, Guang-Can Guo
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Minimal Tradeoff and Ultimate Precision Limit of Multiparameter Quantum Magnetometry under the Parallel Scheme
The precise measurement of a magnetic field is one of the most fundamental and important tasks in quantum metrology. Although extensive …
Zhibo Hou, Hongzhen Chen, Liqiang Liu, Zhao Zhang, Guo-Yong Xiang, Chuan-Feng Li, Guang-Can Guo, Haidong Yuan
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Fluctuation-enhanced quantum metrology
The main obstacle for practical quantum technology is the noise, which can induce the decoherence and destroy the potential quantum …
Yu Chen, Hongzhen Chen, Jing Liu, Zibo Miao, Haidong Yuan
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Optimal joint estimation of multiple Rabi frequencies
We study the joint estimation of multiple Rabi frequencies in a multilevel system. By analytically identifying the optimal probe state …
Hongzhen Chen, Haidong Yuan
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