A note on local unitary equivalence of isotropic-like states  

作　　者：张廷桂 华波波 李明 赵明镜 杨红 

机构地区：[1]School of Mathematics and Statistics, Hainan Normal University [2]School of Mathematical Sciences, LMNS, Fudan University [3]College of Science, China University of Petroleum [4]Department of Mathematics, School of Science, Beijing Information Science and Technology University [5]College of Physics and Electronic Engineering, Hainan Normal University

出　　处：《Chinese Physics B》2015年第12期228-231,共4页中国物理B（英文版）

基　　金：Project supported by the National Natural Science Foundation of China(Grant Nos.11401032;61473325;11501153;11105226;11275131;and 11401106);the Fundamental Research Funds for the Central Universities;China(Grant Nos.15CX08011A and 24720122013);the Natural Science Foundation of Hainan Province;China(Grant Nos.20151005 and 20151010);the Scientific Research Foundation for the Returned Overseas Chinese Scholars;State Education Ministry

摘　　要：We consider the local unitary equivalence of a class of quantum states in a bipartite case and a multipartite case. The necessary and sufficient condition is presented. As special cases, the local unitary equivalent classes of isotropic state and Werner state are provided. Then we study the local unitary similar equivalence of this class of quantum states and analyze the necessary and sufficient condition.We consider the local unitary equivalence of a class of quantum states in a bipartite case and a multipartite case. The necessary and sufficient condition is presented. As special cases, the local unitary equivalent classes of isotropic state and Werner state are provided. Then we study the local unitary similar equivalence of this class of quantum states and analyze the necessary and sufficient condition.

关 键 词：mixed state local unitary equivalence local unitary similar equivalence 

分 类 号：O413[理学—理论物理]