单Tavis-Cummings模型中量子关联动力学演化特性及其在量子通信中的应用  

Quantum Correlation Dynamics in the Single Tavis-Cummings Model and Its Application in Quantum Communication

作　　者：麦日克那·艾力 艾合买提·阿不力孜[1] 艾尔肯江·艾木都拉 马蓉 帕提古丽·马木提 Markina Ali, Ahmad Abliz, Erkinjan Hamdulla, MA Rong, Patigul Mamut(College of Physics and Electronic Engineering, Xinjiang Normal University, Urumqi 830054, Chin)

机构地区：[1]新疆师范大学物理与电子工程学院

出　　处：《量子光学学报》2018年第1期5-13,共9页Journal of Quantum Optics

基　　金：新疆维吾尔自治区杰出青年基金项目(2013911019);国家高层次人才特殊支持计划后备人选之科技创新领军人才项目;自治区天山英才工程第二层次培养人选项目

摘　　要：本文研究了单Tavis-Cummings模型中两个全同二能级原子与单模光腔发生相互作用时两个原子之间的各种量子关联演化特性,并讨论了该模型中稠密编码和隐形传态的实现。讨论初始态纯度、纠缠度、腔内光子数和腔与原子之间的耦合常数对量子纠缠、量子失协和几何量子失协动力学演化特性的影响并分析出实现稠密编码和量子隐形传态所需最佳参数。结果表明：初始态纯度r和初始纠缠度a对以上三种量子关联有积极作用;随着腔与原子之间的耦合常数g和腔内光子数n的增大,量子关联振荡频率加快,同时量子纠缠死亡时间缩短,而此时量子失协、几何量子失协则仍保持非零。这表明量子失协、几何量子失协相比纠缠更具有优越性。In this paper,the quantum correlation dynamics and its application in quantum dense coding and quantum teleportation are investigated in the single Tavis-Cummings model in which the single mode light cavity interacts with two two-level atoms in the initial W-state.By analyzing the effects of the various system parameters on the quantum correlations,the optimal parameters were found out,which can be used for the implementation of dense coding and teleportation.The results showed that the quantum correlations can be strengthened by the enhancement of the initial state purity rand entanglement degree a;with the increase of the number of photon n,coupling constant g,the oscillation frequency of quantum correlations can be higher and higher,while the duration time of entanglement sudden death can be shortened.Meanwhile quantum discord and geometric quantum discord keep nonzero,indicating that the two latter are superior than the quantum entanglement.

关 键 词：Tavis-Cumming模型 量子关联动力学 量子稠密编码 量子隐形传态 

分 类 号：O431.2[机械工程—光学工程]