三量子位纯态的混合纠缠  

Mixed Entanglement of Triqubit Pure States

作　　者：种波 王嘉瑜 陈博杨 田东平 Chong Bo;Wang Jiayu;Chen Boyang;Tian Dongping(School of Science,Xi’an University of Architecture&Technology,Xi’an 710055,Shaanxi,China)

机构地区：[1]西安建筑科技大学理学院,陕西西安710055

出　　处：《激光与光电子学进展》2022年第11期442-448,共7页Laser & Optoelectronics Progress

摘　　要：提出了一种特殊的真正的三量子位纯态的混合纠缠,与Greenberger-Horne-Zeilinger(GHZ)纠缠和W纠缠不同的是,它同时具有GHZ纠缠和W纠缠的性质。用两个由四个非多余基向量组成的不等价集合来构造混合纠缠态并引入一种新的测量方法,即采用总纠缠度的方法来量化三量子位纯态的纠缠情况(包括混合纠缠)。揭示了Walther等已报道的实验中最终态下出现混合纠缠,且其中W纠缠比GHZ纠缠占比更大这一现象。A special real mixed entanglement of triqubit pure states is proposed.Different from GreenbergerHorneZeilinger(GHZ)entanglement and W entanglement,it has the properties of GHZ entanglement and W entanglement at the same time.The mixed entangled states are constructed using two inequivalent sets composed of four nonsuperfluous basis vectors.A new measurement method,the total tangle,is introduced for quantifying total entanglement(including mixed entanglement)of the triqubit pure states.It is revealed that there is mixed entanglement in the final state in the experiment reported by Walther et.al.,and the proportion of W entanglement is larger than that of GHz entanglement.

关 键 词：量子光学 三量子位纯态 混合纠缠 总纠缠度 不等价集 

分 类 号：O469[理学—凝聚态物理]