Randomly Generating Four Mixed Bell-Diagonal States with a Concurrences Sum to Unity

查看全文 作　　者：[1]S.P.Toh;Hishamuddin [2,3]Zainuddin;Kim Eng [2,4]Foo 机构地区：[1]Faculty of Engineering,The University of Nottingham Malaysia Campus,Jalan Broga,43500 Semenyih,Selangor Darul Ehsan,Malaysia;[2]Laboratory of Computational Sciences and Mathematical Physics,Institute for Mathematical Research,Universiti Putra Malaysia,43400 UPM Serdang,Selangor,Malaysia;[3]Department of Physics,Faculty of Science,Universiti Putra Malaysia,43400 UPM Serdang,Selangor,Malaysia;[4]Faculty of Health and Life Sciences,INTI International University,Persiaran Perdana BBN,Putra Nilai,71800 Nilai,Negeri Sembilan,Malaysia 出　　处：《Chinese Physics Letters》索引2012年第29卷第1期,共4页 摘　　要：A two-qubit system in quantum information theory is the simplest bipartite quantum system and its concurrence for pure and mixed states is well known.As a subset of two-qubit systems,Bell-diagonal states can be depicted by a very simple geometrical representation of a tetrahedron with sides of length 2√2.Based on this geometric representation,we propose a simple approach to randomly generate four mixed Bell decomposable states in which the sum of their concurrence is equal to one. 关 键 词：quantum CONCURRENCE representation