计算了密度矩阵、配分函数和熵。
采用密度矩阵方法描述了两模反向耦合。
In this paper the method of density matrix is used to describe two coupled modes.
密度矩阵II。量子敲打。亚体系和偏迹。
Density Matrices II. Quantum Beats. Subsystems and Partial Traces.
密度矩阵i。初始非本征态的准备、演化、探试。
Density Matrices I. Initial Non-Eigenstate Preparation, Evolution, Detection.
我们利用密度矩阵重整化群方法来研究熵的对数行为。
The method of density matrix renormalization-group is applied to obtain logarithmic behavior of the entropy.
用密度矩阵理论描述了系统对探测光的吸收和色散性质。
Using the density matrix theory describes the absorption and dispersion properties of the detecting light.
推导了三步光电离的场方程组和原子布居的密度矩阵方程组。
The equation of three step photoionization for describing the field and the density matrix as well as the atomic population was derived.
通过密度矩阵重整化群的方法，我们研究了不同系统中的基态纠缠。
By using the method of density matrix renormalization group, the ground state entanglement in different systems is studied.
本文简明地描述了由载流子带内弛豫加宽的半经典的密度矩阵理论。
The semiclassical density-matrix theory with carrier intraband relaxation broading is described.
根据系统密度矩阵，讨论了系统熵随时间的演化和系统光子统计性质。
According to the system density matrix, discussed the evolution of the system entropy with time and photon statistical properties of the system.
但在一些场合下，取半经典和密度矩阵模型对进行定量的计算是十分必要的。
In some cases, however, the quantitatively ac-curate results necessitate the density matrix theory and the semiclassical model.
本文在已有的索单元力密度矩阵的基础上推导了三角形膜单元的力密度矩阵。
On the basis of force density matrix of cable element, a force density matrix of triangle membrane element is introduced.
根据单元力密度矩阵集成整体力密度矩阵的规律，提出了矩阵坐标法的概念；
According to the law which is how the element density matrix is integrated into overall density matrix, this paper put forward the concept of matrix coordinate method;
利用量子力学中的密度矩阵算符理论导出了该系统中三次谐波产生的解析表达式。
An analytic representation for the third-harmonic generation along the well is derived by the density matrix operator theory of the quantum mechanics.
提出平均场壳模型下原子核单体密度矩阵的一种计算方法，验证该方法的可靠性。
A method calculating one body density matrix of nucleus in the mean field shell model is proposed.
介绍了量子计算与量子信息中的一些重要的矩阵及其应用，包括密度矩阵、酉矩阵等。
We introduce some important matrices and their applications in quantum computation and quantum information, including density matrix, unitary matrix, etc.
本文用密度矩阵方法严格处理了在共振情况下二能级系统时间分辨简并四波混频问题。
In this paper, the time-resolved degenerate four-wave mixing in two-level system is treated rigorously with the density-matrix method.
求解了经典电磁场中二能级原子系统的密度矩阵演化方程，得到了系统状态的相干特性。
We have found out the equation of density matrix evolution of the two-level atomic system in the classic electromagnetism field. The Law of coherence of the state is obtained.
由于多数化学反应在液相中进行，故密度矩阵理论被广泛地应用于研究液相分子反应动力学。
Since most chemical reactions are carried out in the liquid phase, the density matrix theory has been widely used in the study of molecular reaction dynamics.
根据约化密度矩阵与基态能量之间的关系，我们给出了约化保真率和量子相变之间的一般关系。
A general connection between the reduced fidelity susceptibility and quantum phase transitions is given in terms of the relation between reduced density matrix and ground-state energy.
由单体密度矩阵计算得到的核子密度分布等与实验数据、理论值和其他方法的计算结果作了比较。
The nucleon density and momentum distributions are calculated and compared with those of Hatree-Fock-Bogolubov theory and experimental data, respectively.
首先介绍固态中自旋扩散的一般理论，包括半经典描述和建立在投影算子理论上的密度矩阵描述。
This review first summarizes the general theory of spin diffusion in solids, including semi-classical description and the more exact approach, i.
由于均方根偏差只涉及光场密度矩阵的二阶统计矩，在许多情况下，这种物理量不能精确量度光场的量子涨落。
However, RMS deviation only contains the second-order statistical moments of the density operator. Thus under many circumstances, RMS deviation cannot precisely measure the quantum fluctuation.
用密度矩阵的方法从理论上分析了不同频率的两个激光场混合泵浦的光纤放大器中，由光场诱导的原子相干效应。
The effects of atomic coherence on fiber amplifiers pumped by two lasers with different frequences are studied by using density matrix theory.
首先介绍了SLR脉冲设计思想，然后基于密度矩阵理论，应用计算机模拟方法对所设计脉冲的激发带宽进行模拟。
In this article, we present a design method of the SLR pulse. Subsequently, based on density-matrix theory, computer simulations are used to show the excitation profiles of the designed SLR pulses.
通过对图的密度矩阵简单的组合条件(“度数条件”)判断图的密度矩阵的可分性。这个条件直接与PPT判据相联系。
We test the separability of the density matrix by researching the simple combinatorial condition (the "degree condition"), the condition is directly related to the PPT-criterion.
两个两能级原子置于外部环境(热库)中，当计及原子偶极间的相互作用时，通过研究两个原子约化密度矩阵，分析原子状态消相干规律。
We study a pair of two-level atoms reducible density rectangular array when atoms by dipole-dipole interaction are put in a thermal reservoir. Decoherence of atoms is analyzed.
该方法不是从第一原理出发，因为耗散环境应该被看成是自由度为无限维的谐振子或原子系统，对它的求解最好的方式是求解约化密度矩阵方程。
This method is not from the first principle. A better approach is based on the reduced density matrix, which eliminate the infinite number of the freedoms of the dissipative environment.
该方法不是从第一原理出发，因为耗散环境应该被看成是自由度为无限维的谐振子或原子系统，对它的求解最好的方式是求解约化密度矩阵方程。
This method is not from the first principle. A better approach is based on the reduced density matrix, which eliminate the infinite number of the freedoms of the dissipative environment.
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