740 citations · 2k across the 28 of their papers we have counts for
5 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…
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…
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…
Non-unital non-Markovianity of quantum dynamics
Jing Liu, Xiao-Ming Lu, Xiaoguang Wang
We show that Breuer-Laine-Piilo (BLP) non-Markovianity cannot capture the dynamical information in the non-unital aspect of the quantum dynamics. Moreover, we provide a measure on…