CAJ | 학술논문

本文分析了与各自自旋链环境相互耦合的 qubit和 qutrit中的 negativity和几何量子失协动力学，讨论了系统和环境间的耦合强度 g、各向异性参数γ、粒子数 N、初始参数 p以及 Dzyaloshinsky-Moriya相互作用对系统演化的影响，得到一些重要结论。另外发现，依赖于各参数的选取，negativity不总是大于几何量子失协，且几何量子失协存在突然改变点。
본문분석료여각자자선련배경상호우합적 qubit화 qutrit중적 negativity화궤하양자실협동역학，토론료계통화배경간적우합강도 g、각향이성삼수γ、입자수 N、초시삼수 p이급 Dzyaloshinsky-Moriya상호작용대계통연화적영향，득도일사중요결론。령외발현，의뢰우각삼수적선취，negativity불총시대우궤하양자실협，차궤하양자실협존재돌연개변점。
We analyzed the dynamical behaviours of negativity and geometric quantum discord in a qubit and qutrit system in this paper.The central qubit (qutrit)was coupled with its own spin-chain environment. The effect of coupled strength g,anisotropy parameterγ,the number of particles N,the initial parameter p and Dzyaloshinsky-Moriya interaction on evolution of system was investigated and some significant results have been obtained.What’s more,it was shown that the negativity was not always greater that the geometric quantum discord,and there was the sudden change point for geometric quantum discord when the proper parameters were chosen.