title: Renormalization-group approach to quantum Fisher information in an XY model with staggered Dzyaloshinskii-Moriya interaction.
abstract: We investigate the quantum Fisher information and quantum phase transitions of an XY spin chain with staggered Dzyaloshinskii-Moriya interaction using the quantum renormalization-group method. The quantum Fisher information, its first-derivatives, and the finite-size scaling behaviors are rigorously calculated respectively. The singularity of the derivatives at the phase transition point as a function of lattice size is carefully discussed and it is revealed that the scaling exponent for quantum Fisher information at the critical point can be used to describe the correlation length of this model, addressing the substantial role of staggered Dzyaloshinskii-Moriya interaction in modulating quantum phase transitions.
authors.affiliation: Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, China.|Institute of Mathematical and Physical Sciences, Jiangsu University of Science and Technology, Zhenjiang 212003, China.
authors.forename: X M
authors.initials: XM
authors.lastname: Liu
authors.affiliation: Institute of Signal Processing &Transmission, Nanjing University of Posts and Telecommunication, Nanjing 210093, China.
authors.forename: W W
authors.initials: WW
authors.lastname: Cheng
authors.affiliation: Laboratory of Solid State Microstructure, Nanjing University, Nanjing 210093, China.
authors.forename: J-M
authors.initials: JM
authors.lastname: Liu