153 citations · 530 across the 7 of their papers we have counts for
4 papers · 1 filter
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…