纠缠的

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。

This paper compares conditional entropy of entanglement and concurrence at the same condition,and the result shows that the curves of their evolvements are identical.

应用条件熵纠缠度研究了真空腔场中两全同二能级原子之间纯态和一类混合态纠缠的时间演化，比较了相同条件下两全同原子系统concurrence纠缠度的时间演化。

Disentanglement refers to the transformation of entangled quantum system intodisentangled system via some physical processes.

所谓消纠缠，是指通过一定的物理过程，使原来纠缠的量子系统变得"不纠缠"。

As shown by the present theory,Auniversal and ideal disentanglement process doesn't exist,i.e.there are not a universalphysical process which may disentangle any a entangled state and preserve its localreduced density matrix unchanged.

现已有理论证明普适而理想的消纠缠过程是不存在的，即：对于一个任意的纠缠态，不存在一个普适的物理过程在使其消纠缠的同时维持局域子系的密度矩阵不变。

The entanglement of formation and the Peres condition have good correspondence, and if the mixed-state deviates the similar pure state slightly, its maximum entanglement drops suddenly. The conclusion of the entanglement of the infinite dimension mixed-state in J-C model never losing is demonstrated besides finding the necessary condition of disentanglement of the finite dimension mixed-state in J-C model.

通过研究有限维混合态光场与二能级原子相互作用系统中的纠缠，发现形成纠缠理论与Peres判据有着良好的对应，同时看到偏离纯态很小的混合态，其最大纠缠度急剧减小；找到了有限维混合态J-C模型在演化过程中出现消纠缠的必要条件，论证了在无限维情况总存在纠缠的结论。

We find that the uniform magnetic field B can induce entanglement in some models that exit no entanglement before, and can reduce or extend the range of entanglement degree of some models.

我们发现磁场的加入，使得原本不存在纠缠的模型产生了纠缠，而且还缩小或扩大了某些模型的纠缠范围。

Based on the Hamiltonian of the interaction system, which includes the interaction between two two-level atoms and a single mode vacuum field, the state vector and the density matrix of the system, and the reduced-density matrices of the subsystems are obtained by solving its Schrodinger equation, and the basic model of this problem is established.

从两个二能级原子与单模真空场相互作用系统的哈密顿量出发，通过解Schrodinger方程，得到了系统的态矢、密度矩阵和子系统的约化密度矩阵，建立了本文的工作模型。第二章介绍了量子熵与量子纠缠的发展史，解释了量子熵与量子纠缠的关系，阐述了量子熵与量子纠缠的基本理论。第三章研究了两个二能级原子与单模真空场相互作用系统中的量子纠缠。

The efficiency of a quantum gate is determined by its entangling power.

我们通过研究算符的纠缠能力来确定一个量子门产生纠缠的效率。

Secondly,two-photon entangled pair is produced in noncollinear direction.Wediscuss the influence of fourth-order interference with three different length crystalsand with different frequency distribution of interference filters.

其次，利用飞秒脉冲II型参量下转换在非共线方向产生偏振纠缠的双光子对，我们利用三块不同长度晶体分析晶体长度以及探测谱线宽度对纠缠四阶干涉的影响，实验选用长度分别为0.1mm、0.5mm和1.0mm的BBO晶体。

We investigate the nearest-neighbor entanglement in a one-dimensional dimerized Heisenberg model as a function of temperature and the magnetic field.

外磁场和温度均可以控制纠缠的大小，合适的磁场和温度能够使纠缠重现，而当磁场或温度超过一定值以后，相邻两量子位间的纠缠都会消失。

Means the parent directory, so this command means to execute "toolchain.sh," which is in the current directory.

代表父目录，所以这个命令就是执行当前目录下的"toolchain.sh"。

Yes,In fact,I'm on our city ream.

是的。事实上我是我们市队的。