Monogamous nature of symmetric N-qubit states of the W class: Concurrence and negativity tangle

作     者：P.J.Geetha K.O.Yashodamma Sudha 

作者机构：Department of Physics Kuvempu University Inspire Institute Inc. 

出 版 物：《Chinese Physics B》 (中国物理B（英文版）)

年 卷 期：2015年第24卷第11期

页      面：85-91页

核心收录：

学科分类：12[管理学] 1201[管理学-管理科学与工程(可授管理学、工学学位)] 0809[工学-电子科学与技术（可授工学、理学学位）] 07[理学] 070205[理学-凝聚态物理] 08[工学] 081201[工学-计算机系统结构] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by Department of Science and Technology Government of India through the award of INSPIRE fellowship 

主　　题：monogamy of quantum entanglement Majorana representation of symmetric pure states concur-rence tangle negativity tangle 

摘      要：Using Majorana representation of symmetric N-qubit pure states, we have examined the monogamous nature of the family of states with two-distinct spinors, the W class of states. We have evaluated the N-concurrence tangle and showed that all the states in this family have vanishing concurrence tangle. The negativity tangle for the W class of states is shown to be non-zero, illustrating the fact that the concurrence tangle is always lesser than or equal to the negativity tangle in a pure N-qubit state.