查询词典 decoherence

Therefore, it is desirable to study a non-Markovian effects of the decoherence and disentanglement in any viable realization of qubits.

这些近似方法在处理与环境耦合较强的固体量子系统退相干、退纠缠动力学行为时，受到了局限，需要改进，特别是对于量子信息关注的短时相干行为。

Thus in this thesis, we will made a detailed introduction of our method--perturbation based on unitary transformation, and apply it to several models to investigate the Non-Markovian decoherence and disentanglement dynamics of dissipation two-state system.

本文中，我们介绍一种新的解析方法-基于幺正变换下的微扰理论，并且把此理论应用到具体的实验模型中，推导了耗散二能级系统非马尔可夫退相干和退纠缠动力学。

So the effect of the environment to the quantum system becomes a center topic, the key of which is to eliminate or suppress the dissipation effect on the quantum system imposed by its surrounding environment, such as decoherence and disentanglement.

新兴的量子信息科学，包括量子调控、量子计算与量子通信领域，无不有赖于小尺寸器件之间的量子相干性，无不希望量子器件能够不受外界环境的影响或减小环境的影响。

Among these methods, it is surprising that few if any fundamental treatments of decoherence exist that include the dynamics of disentanglement with better than the Markovian approximation or phenomenological tradition.

所以研究环境对量子系统的影响，以便减缓环境对其包围下的量子系统的耗散、退相干、退纠缠等负面作用，就成为当今非常重要的课题。

For example, Milburn gave a simply model of intrinsic decoherence, and made a simply modification to the standard quantum mechanics.

其中，Milburn提出了一个简单的内禀退相干模型，给出了对标准量子力学的简单修正。

Numerical calculations are performed on the decoherence rate as a function of the polar angle, the Coulomb binding parameter, the coupling strength, the confinement length of quantum dot and the coefficient dispersion.

由于声子的自发辐射，造成量子比特的消相干，根据数值计算结果，讨论了极角、库仑结合参数、耦合强度和色散系数对消相干速率的影响。

The results show that the entanglement of field-atom reduced to a stationary value with time evolution and the entanglement between two modes increase to another stationary value with intrinsic decoherence, and the values only depend on the two-mode photon number and mean photon number.

结果表明，存在内禀退相干时，随着时间的演化，场一原子纠缠逐渐减小到一个确定值，而模间纠缠逐渐增大到一个确定值，两者演化的最终值只取决于双模光子数差和平均光子数，而与内禀退相干因子无关。

The main contributions are as follows:(1) The decoherence suppression of N level Markovian systems is investigatedby the optimal control in the coherence vector representation. The N level Markoviansystem can be described by the master equation, and possesses a standard bilinear formin the coherence vector representation.

本论文利用密度矩阵相干向量表示研究了退相干效应的抑制和相应的纠缠控制问题，论文主要工作包括：(1)在密度矩阵相干向量表示下，利用最优控制研究N能级Markov系统的退相干抑制问题。N能级Markov系统可以用主方程模型描述，在相干向量表示下具有标准的双线性形式。

The anatomy relationship of venae hepaticae intermediae and its branches on gallbladder bed were analysed,which could be the reference during the LC.Results:For 112 patients suffered from inatrophic cholecystitis and cholecystolithiasis,whose gallbladders were decoherence directdly from ectoptygma muscular coat close to the gallbladder wall.

结果：对于术前经彩色多普勒超声波检查明确的肝中静脉直接和胆囊床相贴的非萎缩性胆囊炎胆囊结石的102例患者，采用紧靠胆囊壁的浆肌层直接进行剥离；而慢性萎缩性胆囊炎胆囊结石的24例患者，采用胆囊粘膜切除，或者直接开腹手术切除，未发生因损伤胆囊床肝中静脉而大出血。

We also simulate phenomenologically the decoherence of the Kondo-coherent state formed in the two-terminal setup in the framework of this three-terminal model.

量子点Kondo效应本身及其对介观系统输运性质的影响都是当前介观物理中最热门的研究领域之一。

The concept of equivalent rotationally rigidity is offered and the formula of rotationally rigidity is obtained.

主要做了如下几个方面的工作：对伸臂位于顶部的单层框架—筒体模型进行分析，提出了等效转动约束的概念和转动约束刚度的表达式。

Male cats normally do not need aftercare with the exception of the night after the anesthetic.

男猫通常不需要善后除了晚上的麻醉。