3 papers
quant-ph2021
Measure of quantum Fisher information flow in multi-parameter scenario
Haijun Xing, Libin Fu
We generalize the quantum Fisher information flow proposed by Lu \textit{et al}. [Phys. Rev. A \textbf{82}, 042103 (2010)] to the multi-parameter scenario from the information geom…
quant-ph2020
Measure of the density of quantum states in information geometry and its application in the quantum multi-parameter estimation
Haijun Xing, Libin Fu
Recently, there is a growing interest in study quantum mechanics from the information geometry perspective, where a quantum state is depicted with a point in the projective Hilbert…
quant-ph2019
Parity-Enhanced Quantum Optimal Measurements
Haijun Xing, Libin Fu, Su Yi
We find a large class of pure and mixed input states with which the phase estimation precision saturates the Cramer-Rao bound under the compound measurements of parity and particle…