【摘 要】
：
The quantum entanglement, discord, and coherence dynamics of two spins in the model of a spin coupled to a spin bath through an intermediate spin are studied. T
【机 构】
：
Department of Physics, Shanghai University, Shanghai 200444, China“,”School of Mathematics, Physics
论文部分内容阅读
The quantum entanglement, discord, and coherence dynamics of two spins in the model of a spin coupled to a spin bath through an intermediate spin are studied. The effects of the important physical parameters including the coupling strength of two spins, the interaction strength between the intermediate spin and the spin bath, the number of bath spins and the temperature of the system on quantum coherence and correlation dynamics are discussed in different cases. The frozen quantum discord can be observed whereas coherence does not when the initial state is the Bell-diagonal state. At finite temperature, we find that coherence is more robust than quantum discord, which is better than entanglement, in terms of resisting the infl uence of environment. Therefore, quantum coherence is more tenacious than quantum correlation as an important resource.
其他文献
当前，我国杂交作物的供种量已占用种量的90％以上，但常规作物的统一供种水平却十分低下，山东小麦常年种植面积6300万亩左右．占耕地面积的60％以上，约需种5亿公斤，1990年以前，统一供种量
时下,“冒风险”成了时髦名词,报刊上提得很多,特别是在宣传改革人物的时候。仿佛那些改革家一个个都是“冒险家”,都是靠“冒风险”冒出来的。其实不然。宣传改革,要反对畏
新课标提倡以探究性学习为核心的多样化学习方式,本文从教师要树立新的教育理念、鼓励学生大胆质疑、组织学生合作交流、让学生多动手参与、物理学习联系生活实际等方面谈了
In this paper we prove that the solution of explicit difference scheme for a class of semilinear parabolic equations converges to the solution of difference sch
本试验以黄瓜（Cucumis sativus L.）品种津优1号3叶期幼苗为试材,在水培条件下研究了CO2浓度倍增与聚乙二醇（PEG 6000）模拟的干旱胁迫对黄瓜幼苗生长发育、非结构性碳水化合物代谢
多媒体教育是一种综合运用声音、文字、图像、动画、视频等多种媒体的现代教育技术.在历史教学中,运用多媒体技术创设情境,从多方位刺激学生的感官,有利于激发学生学习的兴趣
Accurate non-Bo-Oppenheimer variational calculations of all bound states of the positive muon molecular ion 4Heμ+have been performed using explicitly correlate
基于民航行业标准的高技能人才培养模式并非是一种单一的、狭隘的模式,而是一种具有广泛性、层次性和系统性的模式,是一种凝合了校企合作、工学结合的人才培养模式.以民航行
We study the influence of driving ways on the interaction in a two-atoms cavity quantum electrodynamics system. The results show that driving ways can induce di
小学数学活动课的教学设计是一项复杂的系统工程,活动课目标的制订要做到目的性与激励性的结合、统一性与差异性的结合、显性与隐性的结合,活动内容的选择应注意趣味性、拓展