查询词典 entanglement

Also this paper gives a definition of quantum conditional entropy of entanglement E_ A｜Band proves that it satisfies the four fundamental conditions of a entanglement measure for a kind of mixed state of 2×2 quantum system by this negative quantum conditional entropy Using conditional entropy of entanglement,this paper investigates the quantum entanglement between the two identical two-level atoms simultaneously interacting with vacuum cavity field as an application.

给出了负值量子条件作为条件熵纠缠度的定义，证明了条件熵纠缠满足作为2×2系统一类混合纠缠态量度的四个基本条件。当双量子系统处于纯态时，条件熵纠缠度即为部分熵纠缠度。

The results show:(1) that the dynamical properties in the system depend on the degree of entanglement of the initial two identical two-level entangled atoms and the intensity of the coherent optical field, and the atomic dipole moment can be completely squeezed via choosing optimal degree of entanglement of the initial atoms in the feeblish optical field;(2) that the quantum properties of the system also depend on the degree of entanglement of the initial two identical two-level entangled atoms and the intensity of the coherent optical field, and the radiation field can be effectively squeezed via choosing optimal degree of entanglement of the initial atoms in the feeblish optical field.

结果表明：(1)相干态光场的强度和两原子的初始纠缠度对原子的动力学行为有很大的影响。原子布居的振荡频率及幅度和原子偶极压缩的演化规律与光场强弱和两原子初始纠缠度相关联。在弱光场下，选择合适的两原子初始纠缠态，原子偶极矩可以完全被压缩。(2)相干态光场的强度和两原子的初始纠缠度对光场的量子特性也有很大的影响。光场的二阶相干性质和光场的压缩效应均与光场强度和两原子纠缠度相关联。在弱光场中，选择合适的两原子初始纠缠度，光场压缩深度和时间可达到最大。

Here, rather than the remote entanglement we use the local entanglement, which canbe prepared in an easier way than the remote entanglement, to enhance the remoteentanglement; Based on generalized measurement, a general method for theconcentration of a known non-maximally entangled state for arbitrary dimensionalsystem is proposed only by introducing a qubit ancilla, which will greatly simplifythe total concentration process.

这里我们只需要利用局域纠缠而非远程纠缠便可提高远程纠缠；对于任意维系统己知非最大纠缠态的浓缩，可以仅仅通过引入一个二能级系统作为辅助来实现。

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。

The result shows that two atoms entanglement evolution property is opposed to atom-field entanglement evolution property when the coherent amplitude factor was zero or small. The interaction of the atoms and the field weaken the entanglement degree of atom-atom.

结果表明：当相干态振幅参量为零或很小时，两原子间纠缠度随时间演化规律和场-原子纠缠度随时间演化规律几乎相反，场-原子间的纠缠削弱了两原子间的纠缠。

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。

Also, the remaining reduced density, matrices ρ〓 can retain entanglement or disentanglement independently, which can be chosen freely according to our requirement, and the relative entanglement strength of any pair of particles can be arbitrarily adjusted.

我们的研究表明：在SLOCC下，虽然三粒子纠缠纯态可简单地分为两类，即GHZ类和W类，但同类的三粒子纠缠态不一定具有相同的纠缠特性，除了那些在LU下等价的态。

The time evolution of two-atom entanglement displays periodic entanglement and disentanglement when the coupling coefficient of Stark effect is much smaller, while the disentanglement will disappear when the coupling coefficient of Stark effect is much larger.

当 Stark 效应耦合系数很小时，两个原子间纠缠度的时间演化特性呈现周期性纠缠和退纠缠现象；当 Stark 效应耦合系数很大时，原子间退纠缠现象消失，即原子始终保持在纠缠状态。

Although the essences of quantum entanglement are not clear thoroughly, it does not encumber the application of quantum entanglement.

虽然到目前为止，量子纠缠的本质还没有彻底的弄清楚，但是这并不妨碍它的应用。

" I' d like to get some rough idea about music in the baroque ear, please."

请简要介绍一下巴罗克时期的音乐，好吗？

The results showed that the peak latency and pattern of SEPs elicited by electrical needling in LI-l1 and MP were similar. The amplitude of SEPs elicited by electrical needling in LI-l1 was higher than that of MP. There was no obvious SEPs generation when MM was electrical needling.

结果显示，电针刺激曲池穴和其邻近桡侧伸腕长肌运动点诱发性脑电波的波形和波峰时间是类似的，只是穴位的诱发性脑电波波幅较大，而电针刺激非穴位点并没有明显的诱发性脑电位。