Two-dimensional and absolutely entanglement-breaking subspaces  

作　　者：Jian Yan Lin Chen 

机构地区：[1]LMIB(Beihang University),Ministry of Education,and School of Mathematical Sciences,Beihang University,Beijing 100191,China [2]International Research Institute for Multidisciplinary Science,Beihang University,Beijing 100191,China

出　　处：《Communications in Theoretical Physics》2024年第9期21-26,共6页理论物理通讯（英文版）

摘　　要：Entanglement-breaking(EB)subspaces determine the additivity of entanglement of formation(EOF),which is a long-standing issue in quantum information.We explicitly construct the twodimensional EB subspaces of any bipartite system,when system dimensions are equal,and we apply the subspaces to construct EB spaces of arbitrary dimensions.We also present partial construction when system dimensions are different.Then,we present the notion and properties of EB subspaces for some systems,and in particular the absolute EB subspaces.We construct some examples of absolute EB subspaces,as well as EB subspaces for some systems by using multiqubit Dicke states.

关 键 词：entanglement-breaking subspaces entanglement of formation absolutely EB subspaces entanglement cost ADDITIVITY 

分 类 号：O413[理学—理论物理]