非马尔科夫环境中各向异性海森堡自旋链的几何量子失协  

Geometric quantum discord of Heisenberg XYZ model in Non-Markovian environment

作　　者：唐诗生 李瑞鸣 艾合买提·阿不力孜 TANG Shi-Sheng;LI Rui-Ming;Ahmat·Abliz(School of Physics and Electronic Engineering,Xinjiang Normal University,Urumchi 830054,China)

机构地区：[1]新疆师范大学物理与电子工程学院物理系,乌鲁木齐830054

出　　处：《原子与分子物理学报》2022年第2期112-119,共8页Journal of Atomic and Molecular Physics

基　　金：国家自然科学基金(11864042)。

摘　　要：本文主要在非马尔科夫环境中,在时变磁场和Dzyaloshinski—Moriya相互作用下,以最大纠缠态|ψAB〉=1/√2(11〉+00〉)作为信道,研究了具有各种参数的两比特海森堡XYZ模型的几何量子失协.通过在非马尔科夫环境中的量子态扩散方法模拟了系统的几何量子失协随时间的演化关系.根据数值模拟结果显示:环境关联系数γ、自旋耦合系数J和J_(z)、余弦磁场强度B、以及自旋—轨道相互作用都能影响系统几何量子失协的性质.当环境关联系数γ较小时,几何量子失协呈现出明显的上升趋势,可见非马尔科夫环境对系统的几何量子失协表现出积极的作用.同时较大的自旋耦合系数J和余弦磁场强度B对系统的几何量子失协也有积极的影响.In this paper,by using the maximally entangled state|ψAB〉=1/√2(11〉+00〉)as the channel,we study the geometric quantum discord of a two bit Heisenberg XYZ model with various parameters in a non-Markovian environment under the time-varying magnetic field and Dzyaloshinski-Moriya interaction.The results of numerical simulation show that the environmental correlation coefficientγ,spin coupling coefficient J and J_(z),cosine magnetic field intensity B and Dzyaloshinski—Moriya interaction can affect the properties of geometric quantum discord.When the environment correlation coefficientγis small,the geometric quantum discord is obviously on the rise,so it can be seen that the non-Markovian environment plays a positive role in the geometric quantum discord of the system.At the same time,the large spin coupling coefficient and cosine magnetic field intensity also have a positive effect on the geometric quantum discord of the system.

关 键 词：非马尔科夫量子态扩散方法 几何量子失协 自旋-轨道相互作用 

分 类 号：O431.2[机械工程—光学工程]