Distillability sudden death for two-qutrit states under an XY quantum environment  

作　　者：Yao Wang ChangCheng Cheng BingBing Chai JinLiang Guo 

机构地区：[1]College of Physics and Materials Science, Tianjin Normal University

出　　处：《Science China(Physics,Mechanics & Astronomy)》2018年第2期18-25,共8页中国科学：物理学、力学、天文学（英文版）

基　　金：supported by the National Natural Science Foundation of China (Grant Nos. 11305114, 11304226, and 11505126)

摘　　要：In this study, we investigate the phenomenon of distillability sudden death （DSD） for a two-qutrit system coupled to an XY spin chain. In virtue of the negativity and realignment criterion, we show that certain initial-prepared free entangled states may become bound entangled states in a finite time. The possibility of a DSD not only depends on the initial state parameter, but is also determined by the coupling between the two-qutrit system and the spin chain. The effects of other parameters related with the system and the spin chain （e.g., the total number of spins in the spin chain, strengths of the transverse field, and anisotropy parameter） on the time-determined bound entangled state are also investigated in detail. Accordingly, some effective methods of controlling the DSD are proposed.distillability sudden death;;bound entangled states;;negativity;;realignment criterion;;entanglement

关 键 词：distillability sudden death bound entangled states NEGATIVITY realignment criterion entanglement dynamics 

分 类 号：N0[自然科学总论—科学技术哲学]