317 citations · 1k across the 33 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…
Quantum Fisher information and spin squeezing in one-axis twisting model
Wei Zhong, Jing Liu, Jian Ma +1
We consider the quantum Fisher information and spin squeezing in one-axis twisting model with a coherent spin state . We analytically discuss the dependence of…
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…