153 citations · 530 across the 7 of their papers we have counts for
7 papers
Maximal quantum Fisher information for general su(2) parametrization processes
Xiao-Xing Jing, Jing Liu, Heng-Na Xiong +1
Quantum Fisher information is a key concept in the field of quantum metrology, which aims to enhance the parameter accuracy by using quantum resources. In this paper, utilizing a r…
Quantum Fisher information and symmetric logarithmic derivative via anti-commutators
Jing Liu, Jie Chen, Xiao-Xing Jing +1
Symmetric logarithmic derivative (SLD) is a key quantity to obtain quantum Fisher information (QFI) and to construct the corresponding optimal measurements. Here we develop a metho…
Quantum metrology with unitary parametrization processes
Jing Liu, Xiaoxing Jing, Xiaoguang Wang
Quantum Fisher information is a central quantity in quantum metrology. We discuss an alternative representation of quantum Fisher information for unitary parametrization processes.…
Quantum Fisher information for density matrices with arbitrary ranks
Jing Liu, Xiao-Xing Jing, Wei Zhong +1
We provide a new expression of the quantum Fisher information(QFI) for a general system. Utilizing this expression, the QFI for a non-full rank density matrix is only determined by…
Optimal condition for measurement observable via error-propagation
Wei Zhong, Xiao-Ming Lu, Xiaoxing Jing +1
Propagation of error is a widely used estimation tool in experiments, where the estimation precision of the parameter depends on the fluctuation of the physical observable. Thus wh…
Phase matching condition for enhancement of phase sensitivity in quantum metrology
Jing Liu, Xiaoxing Jing, Xiaoguang Wang
We find a phase matching condition for enhancement of sensitivity in a Mach-Zehnder interferometer illuminated by an arbitrary state in one input port and an odd(even) state in the…
Quantum Fisher Information of Entangled Coherent States in a Lossy Mach-Zehnder Interferometer
Xiaoxing Jing, Jing Liu, Wei Zhong +1
We give an analytical result for the quantum Fisher information of entangled coherent States in a lossy Mach-Zehnder Interferometer recently proposed by J. Joo et al. [Phys. Rev. L…