在相关退相通道中推迟可蒸馏性猝死

Postponing Distillability Sudden Death in a Correlated Dephasing Channel.

作者信息

Xue Guanghao, Qiu Liang

机构信息

School of Materials and Physics, China University of Mining and Technology, Xuzhou 221116, China.

出版信息

Entropy (Basel). 2020 Jul 29;22(8):827. doi: 10.3390/e22080827.

DOI:10.3390/e22080827

PMID:33286598

原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC7517415/

Abstract

We investigated the dynamics of a two-qutrit system in a correlated quantum channel. The partial correlations between consecutive actions of the channel can effectively postpone the phenomenon of distillability sudden death (DSD) and broaden the range of the time cutoff that indicates entanglement of the positive partial transpose states. Particularly, the negativity of the system will revive and DSD will disappear in the fully correlated channel.

摘要

我们研究了相关量子信道中两量子三态系统的动力学。信道连续作用之间的部分相关性可以有效地推迟可提纯性猝死（DSD）现象，并拓宽表明正部分转置态纠缠的时间截止范围。特别地，在完全相关信道中，系统的负性将恢复，且DSD将消失。