纠缠

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"。

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。

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。

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。

We study the entanglements of the Heisenberg XX chain with impurity in the presence of a uniform magnetic field along the z axes by means of negativity.

论文通过分析系统的杂质位与其余部分间的纠缠N1-A以及单个正常位与其余部分间的纠缠NL-A研究了匀强磁场作用下的含杂质Heisenberg XX链的纠缠特性。

With increasing coherent amplitude factor or decreasing squeezing factor of light, the time of two atoms stay in the steady entangled state become longer. The increase of the coherent amplitude factor or the decrease of squeezing factor of light will lead to the increase of atom-atom entanglement degree while the decrease of atoms-field entanglement degree.

随着相干态振幅参量增大或光场压缩参量减小，在一定时域内，两原子处于稳定的纠缠态，并且这个时域逐渐变长，同时原子-原子平均纠缠度值增大，而场-原子平均纠缠度值减小。

We use continuous wave laser beam to pump nonlinear crystals and successfully prepared two-photon polarization entangled states with high brightness and entanglement degree.

我们利用连续波激光束泵浦非线性晶体的自发参量下转换过程制备出了双光子偏振纠缠态，其纠缠源亮度和纠缠度都接近于国际上同类研究的领光水平。

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。

We propose a scheme for probabilistically teleporting an unknown three-particle entangled state of three-level by using a four-particle entangled state of three-level as quantum channel.

提出一种分别利用四个三态粒子的最大纠缠态和非最大纠缠态作为量子通道来传输一未知的三个三态粒子纠缠态的方案。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。