Local quantum Fisher information and quantum correlation in the mixed-spin Heisenberg XXZ chain

作     者：Peng-Fei Wei Qi Luo Huang-Qiu-Chen Wang Shao-Jie Xiong Bo Liu Zhe Sun 

作者机构：School of PhysicsHangzhou Normal UniversityHangzhou 310036China Zhejiang Institute of Modern Physics and School of PhysicsZhejiang UniversityHangzhou 310027China School of Information and Electrical EngineeringHangzhou City UniversityHangzhou 310015China Zhejiang Provincial Key Laboratory of Urban Wetlands and Regional ChangeHangzhou 311121China 

出 版 物：《Frontiers of physics》 (物理学前沿（英文版）)

年 卷 期：2024年第19卷第2期

页      面：235-245页

核心收录：

学科分类：07[理学] 070201[理学-理论物理] 0702[理学-物理学] 

基　　金：supported by the National Natural Science Foundation of China(NSFC)under Grant No.12175052 the Postdoctoral Science Foundation of China(No.2022M722794) 

主　　题：local quantum Fisher information quantum correlation mixed-spin Heisenberg XXZ chain 

摘      要：We study the local quantum Fisher information(LQFI)in the mixed-spin Heisenberg XXZ *** the maximal and minimal LQFI are studied and the former is essential to determine the accuracy of the quantum parameter estimation,the latter can be well used to characterize the discord-type quantum *** investigate the effects of the temperature and the anisotropy parameter on the maximal LQFI and thus on the accuracy of the parameter *** we make use of the minimal LQFI to study the discord-type correlations of different site *** dimensions of the subsystems cause different values of the minimal LQFI which reflects the asymmetry of the discord-type *** addition,the site pairs at different positions of the spin chains have different minimal LQFI,which reveals the influence of the surrounding spins on the bipartite quantum *** results show that the LQFI obtained through a simple calculation process provides a convenient way to investigate the discord-type correlation in high-dimensional systems.