Effects of quantum quench on entanglement dynamics in antiferromagnetic Ising model  

作　　者：李玥 房盼盼 王哲 张盼盼 徐玉良 孔祥木 Yue Li;Panpan Fang;Zhe Wang;Panpan Zhang;Yuliang Xu;Xiangmu Kong(School of Physics and Optoelectronic Engineering,Institute of Theoretical Physics,Ludong University,Yantai 264025,China;College of Physics and Engineering,Qufu Normal University,Qufu 273165,China;Department of Physics,Beijing Normal University,Beijing 100875,China)

机构地区：[1]School of Physics and Optoelectronic Engineering,Institute of Theoretical Physics,Ludong University,Yantai 264025,China [2]College of Physics and Engineering,Qufu Normal University,Qufu 273165,China [3]Department of Physics,Beijing Normal University,Beijing 100875,China

出　　处：《Chinese Physics B》2023年第10期199-204,共6页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant No.11675090);the Natural Science Foundation of Shandong Provincie,China(Grant No.ZR2022MA041)。

摘　　要：We study the relationship between quench dynamics of entanglement and quantum phase transition in the antiferromagnetic Ising model with the Dzyaloshinskii–Moriya(DM)interaction by using the quantum renormalization-group method and the definition of negativity.Two types of quench protocols(i)adding the DM interaction suddenly and(ii)rotating the spins around x axis are considered to drive the dynamics of the system,respectively.By comparing the behaviors of entanglement in both types of quench protocols,the effects of quench on dynamics of entanglement are studied.It is found that there is the same characteristic time at which the negativity firstly reaches its maximum although the system shows different dynamical behaviors.Especially,the characteristic time can accurately reflect the quantum phase transition from antiferromagnetic to saturated chiral phases in the system.In addition,the correlation length exponent can be obtained by exploring the nonanalytic and scaling behaviors of the derivative of the characteristic time.

关 键 词：quantum entanglement quantum phase transition quantum quench quantum renormalization group 

分 类 号：O413[理学—理论物理]