CAJ | 학술논문

研究了在相位阻尼作用下非 X态的量子失协与几何失协，用图像诠释了 Bloch矢量以及相位阻尼系数p对失协的影响。通过讨论我们发现量子失协和几何失协都能在一段有限时间间隔内保持一定值，并且具有相同的突变点。量子失协和几何失协不会出现量子纠缠的突然死亡和重生现象，所以研究失协比纠缠更具有实际应用意义。
연구료재상위조니작용하비 X태적양자실협여궤하실협，용도상전석료 Bloch시량이급상위조니계수p대실협적영향。통과토론아문발현양자실협화궤하실협도능재일단유한시간간격내보지일정치，병차구유상동적돌변점。양자실협화궤하실협불회출현양자규전적돌연사망화중생현상，소이연구실협비규전경구유실제응용의의。
We investigated the level surfaces of quantum discord and geometric discord of Non-X state under the phase damping channel,and provided a pictorial interpretation of the quantum discord and geometric discord for different values of Bloch vectors and the phase damping coefficient p.After a discussion we found that quantum discord and geometric discord can maintain a certain value in a finite time interval,and share the same sudden change point.With respect to the sudden death and rebirth of entanglement,quantum discord and geometric discord have a more practical significance.