查询词典 entanglement

This thesis mainly studies the operator entanglement in heisenberg chains and the entanglement properties of dirac electronic state.

这篇毕业论文主要研究了海森堡链中的算符纠缠与狄拉克电子态的纠缠性质。

We find that when the two input modes are classical states, there is no entanglement produced at all; but even both of the two modes are nonclassical, there is no entanglement under certain condition.

我们发现，当输入的两个模都是经典态时，不会有纠缠产生；但即使两个输入模都是非经典态，在一定条件下，也不能产生纠缠。

These obtained results test and verifys that conditions of an entanglement measure may be taken as the entanglement measure of the prue state and a kind of mixed state of bipartite quantum system.

结果表明，两纠缠度演化规律完全一致，验证了负值量子条件熵可以作为双量子系统纯态和一类混合态的纠缠量度。

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。

As the second part of our research, the effect of stochastic dephasing on quantum coherence and quantum entanglement has been analyzed, and we find that quantum entanglement relies on the fluctuation of random variable in stochastic process.

另外我们分析了几何相在随机过程中的改变：发现几何相的改变不仅依赖于随机变量的涨落，而且依赖于系统的频率。

An important property of quantum entanglement is that the entanglement of a quantum state remains invariant under local unitary transformations on the subsystems.

量子纠缠的一个重要性质是在局部幺正变换下是不变的。

The apparent degree of network chains for the different swollen extent of the same unswollen hydrogel sample increased linearly with the increase of swelling ratio, however, the apparent modulus did not decrease monotonously with the increase of swelling ratio. Furthermore, the dependence of apparent degree of network chains on swelling ratio had nothing to do with the swelling agent. The above results reflected the changes of entanglement and the contribution of entanglement under different swelling ratio, and the results could be explained with the theory of Flory-Erman's constrained junction model and LangleyGraessley relation.

发现同一水凝胶样品的不同溶胀程度试样经应力应变测试得出的表观网链密度随体积溶胀率的增加而线性增加，等效模量并不随溶胀程度的增加而单调减小，而表观网链密度的溶胀程度依赖性与所选用的溶胀剂无关，该结果反映了不同溶胀程度下缠结的变化及缠结对弹性的不同贡献，并可由Flory-Erman的constrained junction模型及Langley-Graessley公式得到解释。

The quantum entanglement in a system which is composed of two entangled atoms interacting with the squeezed coherent state is studied by means of the full quantum theory. The influences of the coherent amplitude factor, the squeezing factor, the ratio of two coupling coefficients on the entanglement property are discussed.

利用全量子理论，研究了双原子与压缩相干态光场相互作用系统的量子纠缠特性，分别讨论了相干态振幅参量、光场压缩参量和耦合系数比值对系统场熵和原子相对熵演化的影响。

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 show that, although the Fenna Matthews Olson protein in natural conditions largely contains bipartite entanglement between dimerized chromophores, a small amount of long-range and multipartite entanglement should exist even at physiological temperatures.

之前的科学结论认为，量子纠缠是一种非常脆弱的状态，很难得到和维持，而研究人员现在证明，量子纠缠能够在一个生物系统中存在并且持续一段时间。

The work of this paper is as follows: 1. Looking back the progressing history of the linear motor, introducing the features of the elevator driven by linear induction motor, radicating the topic of this paper "the digital frequency variable control of the elevator bi-side direct driven by linear induction motor". The research of this paper covers the conventional VVVF control, space vector based VVVF control, vector control and DTC.

本文主要开展了以下几个方面的工作： 1 回顾了直线电机发展历史，电机的驱动技术演变，特别是针对直线电机的驱动，简要介绍了直线感应电机驱动电梯的优点和不同结构类型，对传统的v／f控制，基于空间矢量法的v／f控制，矢量控制，和基于电压空间矢量的直接转矩控制进行了比较，确立了本课题的研究主题：直线感应电机双边直推式驱动电梯的全数字变频控制。

The article combines with the treatment of a superficial civil air defense work to introduce how the grouting method to improve the performance of the backfill soil.

文章从治理漂浮人防工事的角度提出了注浆技术在改善回填土性质方面的应用，并详细阐述了注浆技术的施工流程。