摘要
文章主要研究在有限温度下两个比特海森堡XX自旋链中Z方向的Dzyaloshinskii-Morriya(D-M)相互作用(Dz)和耦合常数(J)对各种量子关联的影响。研究发现在有限温度下不加Dz时经典关联(CC)和量子失协(QD)都随温度的提高而下降,下降速度也比较快。加了Dz时也是随温度的提高而下降,但是下降速度较慢。从计算分析看,在有限温度下Dz和J对QD和CC有积极作用。调整适当的Dz和J参数,可以有效地控制和提高各种量子关联。
This paper mainly investigates the quantum correlation in two bits Heisenberg XX spin chain at finite temperature Z direction with the Dzyaloshinskii-Morriya （ Dx） interaction, the study loud that at the finite temperature the classical correlation and quantum discord decline with the increase of tem- perature, the decline faster, we added the Dx, he classical correlation and quantum discord decline with the increase of temperature,But the decline slower than former. From the computational analysis , we know that D, and J has a positive effect on the concurrence ,classical correlation and quantum discord. If we ajust the suitable Dx and J ,we will effectively control and increase the various quntum correlation.
出处
《新疆师范大学学报（自然科学版）》
2012年第3期22-25,共4页
Journal of Xinjiang Normal University(Natural Sciences Edition)
基金
新疆维吾尔自治区自然科学基金项目(2012211A052)
新疆师范大学物理与电子工程学院研究生创新基金(No.LL WL Y201108)
关键词
D-M相互作用
海森堡自旋链
量子失协
经典关联
Dzyaloshinskii-Morriya interaction
Heisenberg spin chain
quntum discord
classical correlation.
