纠缠

I study the application of entangled states in quantum information processing. Firstly,we investigate the Dzyaloshinskill-Moriya anisotropic antisymmetric interaction and intrinsic decoherence on entanglement transfer.

其三，研究了在Milburn内在退相干模型中两qutrit系统的纠缠演化，发现纠缠可以通过控制非线性耦合常数来达到最大值。

We find a set of beam splitter parameters which are very useful for the production of entanglement, and for given input states, we find that the greatest entanglement degree determined by nonclassicalities of two input modes can be obtained using these parameters.

我们还发现一组非常便于产生纠缠的分束器参数，而且对于给定的输入模，就在这组参数下，能够得到分束器所能达到的最大纠缠度，它取决于两个输入模的非经典度。

If the phase decoherence is taken into account, there is stationary state entanglement between two fields.

接着我们研究了退相干对纠缠动力学的影响，腔场分别处于真空态，相干态和热态，研究了各种情况下的纠缠动力学过程。

It is very important to study the algorithm for the entanglement transformation between the quantum states determinately or probability.

量子纠缠是一些量子信息处理过程中必不可少的资源，研究量子态之间确定的或概率的纠缠转化的算法是量子信息理论里一项重要的任务。

By the introduction of a quality factor ofdisentanglement we obtain the optimal disentanglement condition.

我们定义了一个衡量消纠缠品质的因子，进而，我们获得了什么样的局域各向同性消纠缠操作是最佳的。

Two ways of carrying out the proposal are investigated, and a new thought of teleportation, disentanglement—teleport—reconstruct entanglement, is given.

研究了实施方案的两种方法，给出了完成隐形传态的一种新思路：解纠缠—隐形传送—重构纠缠。

But due to the rate of disentanglement and entanglement between atom and field becomes more rapid, the distances oscillate more rapidly within each period.

但由于光场与原子的纠缠和退纠缠速率加快，密度算符间距在每个周期内振荡加剧。

By itself consists of the second part of this thesis, which provides adetailed discussion of the so-called finite-time disentanglement in bipartite sys-tems first introduced by Yu and Eberly. The results show that this phenomenonis due to the energy transfer between the system and its surroundings or dueto the internal energy transfer.

通过几个具有代表性的复合体系的退相干模型，我们的工作对复合体系有限时间的量子退纠缠进行了详细的讨论，并得到以下结论：有限时间退纠缠源于系统与其环境，以及系统内部的能量交换。

We attain a sufficientcondition realizing ideal disentanglement by manipulating only one part of the states.Under the condition that one only knows partial information on the set of states weput forward the necessary and sufficient condition for ideal disentangling operations.

我们获得了，为了达到理想的消纠缠，量子态集合所应满足的充分条件；在仅知态集合中量子态的部分信息的限制下，我们得到了理想消纠缠的充分必要条件。

Secondly , we propose a scheme for probabilistically teleporting an unknown three-particle entangled state of three-level by means of a four-particle entangled state of three-level as quantum channel.

本节首先阐述量子信道是最大纠缠态的情况，然后进一步阐述量子信道是非最大纠缠态的情况，我们发现在后者情况时，通过引进一个辅助粒子，并实施一幺正变换，即可以一定的几率完成三个三态粒子的纠缠态的隐形传态。

Objective: To study the effect of polycythemia on blood oxygen saturation.

裴蕾目的：观察RBC剧增而引起的高粘血症对血氧饱和度的影响。

Based on SIMPLER algorithm in the curvilinear body-fitted coordinates, the calculations were performed for Pr=0.7, Re=10~1000 on non-orthogonal non-staggered grids which are generated by elliptic equation systems.

采用曲线坐标系下压力与速度耦合的SIMPLER算法，数值研究了周期性渐扩渐缩波纹通道内脉动流动与换热情况，流动Re数的范围为10~1000，Pr数为0.7。