相互作用的量子比特在不同环境下的共生纠缠度和量子失协分析  

The Analysis on Concurrence and Quantum Discord of Interating Qubits in Different Environments

作　　者：于雁霞[1] 胡燕[1] 嵇英华[1,2] 

机构地区：[1]江西师范大学物理与通信电子学院,江西南昌330022 [2]江西省光电子与通信重点实验室,江西南昌330022

出　　处：《江西师范大学学报（自然科学版）》2012年第6期619-625,共7页Journal of Jiangxi Normal University(Natural Science Edition)

基　　金：国家自然科学基金(11164009)资助项目

摘　　要：研究了初始纠缠的量子比特在不同的环境下共生纠缠度和量子失协的动力学演化.在所研究的几种模型中,发现共生纠缠度强烈地依赖于初始环境,并在演化过程中发生纠缠死亡现象.共生纠缠度和量子失协在演化过程中均出现坍塌和复苏效应,但当量子比特间的相互作用为零时,坍塌和复苏效应消失.可无论在何种情况下,量子失协均不会减小到零,即仍能反映量子比特和系统间的量子关联,显示量子失协比量子纠缠具有更强的抗退相干能力.因此量子失协可作为获得有效量子信息的一种更有效的量子资源.Initial entangled quantum bits in different environments,the dynamical evolution of symbiotic entanglement and quantum of dissonance found symbiotic entanglement degree is strongly dependent on the initial environment,and evolution in the study of several modelin the entanglement deaths phenomenon occurs.symbiotic entanglement and quantum dissonance in the evolution of the collapses and recovery effect,collapse and recovery effects disappear when the interaction between the qubit is zero.Available,regardless of the circumstances in which,quantum dissonance are not reduced to zero,that is able to reflect the quantum correlations between the qubit and systems,the quantum dissonance than have a stronger anti-decoherence quantum entanglement.quantum dissonance can be used as an effective quantum informationa more effective quantum resources.

关 键 词：量子关联 耦合量子比特 量子失协 共生纠缠度 

分 类 号：O431.2[机械工程—光学工程]