Application of Y(sl(2)) Algebra for Entanglement of Two-Qubit System  

作　　者：田立君 秦立国 姜颖 张宏标 薛康 

机构地区：[1]Department of Physics, Shanghai University [2]Shanghai Key Lab for Astrophysics [3]Institute of Theoretical Physics, Northeast Normal University

出　　处：《Communications in Theoretical Physics》2010年第6期1039-1042,共4页理论物理通讯（英文版）

基　　金：Supported by National Natural Science Foundation of China under Grant Nos.10775092 and 10875026;Shanghai Leading Academic Discipline Project (Project number S30105);Shanghai Research Foundation under Grant No.07d222020

摘　　要：We construct the transition operators in terms of the generators of the general Yangian and the reduced Yangian. By acting these operators on a two-qubit pure state, we find that the entanglement degrees of the states are all decreased from the certain values to zero for the reduced Yangian algebra, which makes the state disentangled. This result sheds new light on the physical meaning of Y （sl（2） ） in quantum information.

关 键 词：quantum entanglement Yangian algebra transition operator 

分 类 号：O413[理学—理论物理]