Nonclassical correlations in two-dimensional graphene lattices  

作　　者：Hao Wang 

机构地区：[1]Shanghai Normal University Tianhua College,ShangHai 201815,China

出　　处：《Communications in Theoretical Physics》2024年第4期72-79,共8页理论物理通讯（英文版）

摘　　要：We investigate nonclassical correlations via negativity,local quantum uncertainty(LQU)and local quantum Fisher information(LQFI)for two-dimensional graphene lattices.The explicitly analytical expressions for negativity,LQU and LQFI are given.The close forms of LQU and LQFI confirm the inequality between the quantum Fisher information and skew information,where the LQFI is always greater than or equal to the LQU,and both show very similar behavior with different amplitudes.Moreover,the effects of the different system parameters on the quantified quantum correlation are analyzed.The LQFI reveals more nonclassical correlations than LQU in a two-dimensional graphene lattice system.

关 键 词：NEGATIVITY local quantum uncertainty(LQU) local quantum Fisher information(LQFI) graphene lattices nonclassical correlations 

分 类 号：O413[理学—理论物理]