摘要
以腔量子动力学系统为研究对象,讨论量子关联态的可导引性在结构化光场环境中演化规律.系统与各自环境的相互作用导致了量子退相干,其过程可以通过量子噪声信道描述.从数学几何角度,我们通过量子导引椭体球的动态形变和体积变化,研究两体量子纠缠态中量子可导引性的动力学过程,分析了量子退相干对量子导引非对称性的影响.我们发现,随着量子关联态的演化,系统和各自环境的耦合会大大改变量子导引椭体球的形态,压缩其体积,从而降低量子导引.与单个系统经历量子噪声信道相比,在2个系统同时经历噪声信道的情形中,量子导引椭体球的形变更加剧烈.另一方面,当系统与环境发生强耦合时,与相同时间段内的弱耦合情况相比,量子导引的衰减被加速.
The dynamics of quantum steering property of quantum correlated state is investigated in cavity QED systems coupled to structured environments. The quantum decoherence from the interactions between the system and its surrounding can be described by the quantum noisy channel. From the geometric point of view, the deformation and volume of quantum steering ellipsoid are analyzed to evaluate the dynamics of quantum steering of bipartite quantum entangled states. The effects of quantum decoherence on the asymmetric property of quantum steering are studied. It is found that the environmental noise results in the manifest deformation of quantum steering ellipsoid whose volume is decreased. When the bipartite systems are subjected to the quantum noise from the structured reservoir, the formation is drastically squeezed. In the case of strong couplings between the systems and environments, the rapid decrease of the volume of the ellipsoid happens with the time.
作者
黄雨梦
杨志远
谢燕青
郝翔
HUANG Yu-meng;YANG Zhi-yuan;XIE Yan-qing;HAO Xiang(Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application,School of Mathematics and Physics,Suzhou University of Science and Technology,Suzhou 215009,China)
出处
《云南大学学报（自然科学版）》
CAS
CSCD
北大核心
2019年第2期291-297,共7页
Journal of Yunnan University(Natural Sciences Edition)
基金
江苏省"十三五"重点学科建设项目(20168765)
江苏省研究生创新工程教改项目(JGLX15-150)
苏州科技大学研究生教改项目(SKJG15-06)
