Entanglement Evolution of Two-Coupled Spins in a Time-Dependent Rotating Magnetic Field  

作　　者：ZHANG Shi-Xun ZHU Qin-Sheng KUANG Xiao-Yu 

机构地区：[1]Institute of Atomic and Molecular Physics, Sichuan University, Chengdu 610065, China [2]International Center for Materials Physics, Chinese Academy of Sciences, Shenyang 110016, China

出　　处：《Communications in Theoretical Physics》2008年第10期883-888,共6页理论物理通讯（英文版）

基　　金：National Natural Science Foundation of China under Grant No.10374068;the Doctoral Education Fund of the Ministry of Education of China under Grant No.20050610011

摘　　要：We study the dynamics evolution of a two-qubit Heisenberg XXX spin chain under a time-dependent rotating magnetic field. Based on the algebraic structure of the non-autonomous system, the exact solution of the Schrodinger equation is obtained by using the method of algebraic dynamics. Based on the time-dependent analytical solution, we further study the entanglement evolution between the two coupled spins for different initial states, and find that the entanglement is determined by the coefficients of the initial state and the coupling constant J of the system.

关 键 词：entanglement evolution algebraic dynamics non-autonomous system 

分 类 号：O15[理学—数学]