查询词典 density matrix

By density-matrix renormalization group method, the 1/5-doping effect on the spin-1/2 Heisenberg antiferromagnetic chain is investigated.

利用密度矩阵重整化群方法研究1/5掺杂对自旋1/2海森堡反铁磁链的影响。

Besides,we also draw and describe some other problems in theexisting frame:such as the relation between Schmidt decomposition and localunitary transformation,the vector expression of pure state density matrix,traitsof certain points locating near the boundary of disentangled region.

另外，对于其它一些不甚重要的问题，如Schmidt分解与定域酉变换的联系，纯态密度矩阵的向量表示的特点，非纠缠态区域边界上的点的某些特性等等，我们一并在现有的框架中给出描述。

The structure of uncured mix and vulcanite, physical and chemical interaction between filler and matrix, mechanical property of composites were investigated It was found and explained that the compact relationship among bound rubber, cross-linkage density and physical property in mineral filler/silicone rubber composite In detail, BR〓, D〓(cross-linkage density using basic solvent as swell liquid) and module have direct relationship, because they all show chemical interaction between filler and matrix from different angles, respectively BR〓(bound rubber in toluene solvent), D〓(cross-linkage density using toluene solvent as swell liquid) and tensile strength have compact relationship also, because they all show total interaction from different angles, respectively

研究了未硫化胶和硫化胶的结构、填料与基体的物理化学作用、及这些结构和作用的表现形式，发现和解释矿物填料/硅橡胶复合材料中结合橡胶、交联密度与复合材料的力学性能密切关系。具体说，BR〓、D〓和弹性模量均从某个侧面反映复合材料中填料与基体间的化学作用，三者的关系比较密切：BR〓、D〓和抗拉强度均反映复合材料中填料与基体间总体相互作用，三者的关系比较密切。

This thesis mainly employs the density-matrix renormalization group to investigate the valence bond model. We deal with the one-dimensional and quasi-one dimensional benzenoid systems from medium to infinite sizes successfully and get the ground state energies, the first excited state energies and other properties for the first time.

本论文的主要方面是将密度矩阵重整化群方法引入苯型分子的半经验价键处理，精确计算了一维单层苯型烃及双层苯型烃从小到大，直至无限的基态能量，第一激发态能量及局域芳香性等基本性质。

In chapter 2, we gave the nearly equispaced Ladder-type system model and the density-matrix equations in a rotating frame after taking the effects of spontaneously induced coherence into account.

第二章给出了自发辐射诱导相干影响下的近等间隔的阶梯型三能级系统模型及其密度算符的运动方程的具体推导。

The third chapter talked about two different treatments of quantum decoherence in V〓 system. For one the decoherence factor is been expressed in the form of a random external field. And the mean density matrix is calculated to signal the decoherence by showing its nondiagonal elements to approach to zero. In another numerical work done by us, random interaction between system and environment is imposed to mimic the decoherence factor.

第三章讨论了V〓体系中量子相干性研究的两个工作，一个用随机外场来代表消相干因素，采用对系统的密度矩阵进行随机平均的解析方法得到一些结果，一个是我们用数值计算方法的处理，其中消相干因素考虑成系统和环境的相互作用。

In chapter 3, the Bell CHSH operator is made from Fock states just similar to that Chen proposed in one of his papers and nonlocatily of pair cat states is calculated, then the master equation of the density matrix in phase damping model is given , from which the evolution of pair cat states in phase damping channel is given.

在真空热库中非定域性随时间演化逐渐减弱至消失。在第三章里，类似陈增兵文章里的方法用福克态构建了Bell CHSH算符，计算了对猫态的非定域度，之后给出相阻尼通道模型中密度算符的演化，研究了对猫态在相阻尼通道中随时间的演化特性。

According to the characteristic of wind field on bridge main deck, WAWS is utilized to simulate the fluctuating wind velocity time history. By use of the explicit decomposition of the wind velocity spectrum density matrix and the FFT technique, the efficiency of simulation is improved greatly.

根据桥梁主梁处风场特点，利用谐波合成法模拟了主梁处的脉动风速时程，通过对脉动风速谱密度矩阵的显式分解和FFT技术的引入，极大的提高了模拟效率。

In this paper a full density matrix treatment is adopted to deal with the interaction between long-pulse, circularly-polarized light and the sodium atoms. The time evolution curve of each of the 24 sub-state's population probability can be obtained by solving the Bloch equation of twenty-four hyperfine levels.

采用密度矩阵方法来处理长脉冲光与钠原子的相互作用，求解24能级钠精细结构的布洛赫方程，给出参与跃迁的每个态密度随时间的演化曲线。

We also study the Husimi distribution of the excited squeezed vacuum state.The theoretical calculation of Husimi function can help experimentalists to judge the quality of the experiment. We solve the problem of the density matrix for two interacting particles with kinetic coupling by using the bipartite entangled state representation.

作为纠缠Husimi算符理论的应用，我们计算并作图研究了单双模组合压缩态的Wigner函数和Husimi函数及其特性；计算并作图研究了激发压缩真空态的Husimi函数及其特性。

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。