- 更多网络例句与密度矩阵相关的网络例句 [注：此内容来源于网络，仅供参考]
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In this paper, quantum theory, the use of time evolution operator obtained by the first method for the system density operator of any time, and atomic reduced density matrix, and the atomic dipole squeezing conditions, numerical study of the mixed state -type atom of the three-level with single-mode optical field coherent interaction of atomic dipole squeezing effect.
本文采用全量子理论，运用时间演化算符方法先求出所求系统任意时刻的密度算符，和原子的约化密度矩阵，以及原子偶极压缩的条件，数值计算地研究了混合态型3能级与单模相干光场相互作用时原子的偶极压缩效应。
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The key components in laser gyro is He-Ne ring laser, and the reciprocal action theory between light and medium is the base in studying the ring laser, use the Lamb half classical theory, and on the base of density matrix theory, the optical Brounch equation was established, which described the movement of amplifying medium atom in the ring syntonic cavity, and according to the medium polarize theory the self consistent equations was deduced, which describe the light intensity and phasic of the counter-propagating wave. On the basis of this equations, adopted the simulation software MATLAB and virtual instrument programming language LabWindows/CVI, we can do some simulated experiments in study the phenomenas such as amplify and dispersive characteristic of medium, mode pushing effection, burned hole effection and pattern competition, lock-in of frequency and the characteristic of light intensity and phasic of the counter-propagating wave in laser gyro.
激光陀螺的核心部件为He-Ne环形激光器，而掌握光与介质的相互作用理论是研究激光器的关键，采用拉姆半经典理论为主，在密度矩阵理论的基础上，推导环形谐振腔中描述He-Ne气体增益介质原子运动的光学布洛赫方程，运用介质极化理论得出描述激光陀螺反向行波的光强、位相所满足的自洽场方程组，在此基础上，运用MATLAB仿真软件和虚拟仪器编程语言LabWindows/CVI，对激光陀螺中的介质增益色散特性、频率牵引效应、烧孔效应及模竞争、闭锁效应及环激光的光强和相位特性进行仿真试验研究，并且运用全量子理论，对激光工作原理进行分析，得出二能级系统单模辐射场的光子数密度分布，得出激光场的光子统计分布，仿真激光场的动态建立过程。
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In this thesis, a semi-classical model of the force on an atom is used to describe the motion of a two-level atom interacting with a standing wave laser field. The velocity dependent force and momentum diffusion are derived through optical Bloch equations by using the matrix form of the continued fraction technique. By investigating the dynamic properties of atoms in laser field, we can control and manipulate the mechanical motion of an atom.
本文利用半经典理论，从二能级原子在激光驻波场中所满足的运动方程出发，推导出密度矩阵元所满足的递推关系，利用矩阵连分数方法求解出密度矩阵元，从而求出依赖于原子运动速度的光压力与动量扩散系数，通过讨论原子在激光场中的动力学行为，为原子在激光场中被囚禁、形成原子列阵以及可控制的量子态，从而为量子信息处理提供理论基础。
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On the basis of force density matrix of cable element ,a force density matrix of triangle membrane element is introduced.
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。
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We describe density matrix as a vector in this space,that is,to drawout the vector expression in this space.
我们把密度矩阵描述为该空间中的向量，即给出密度矩阵的向量表示，然后将一系列的纠缠判据纳入到一个清晰的几何框架中。
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In the hind part of this paper, a brief introduction of density matrix method is presented and its equivalence to Schroinger equation in multilevel system is described.
在本文的末尾部分，给出了密度矩阵算法的简要介绍，并说明了密度矩阵算法在分析多能级系统布居转移时与薛定谔方程的等效性。
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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.
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。
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Those corresponding to larger eigenvalues will be more important in describing the superblock state, therefore, a criteria is setup for selecting the states.
只有通过考虑"环境"对"体系"的影响，将整个系统（由"环境"和"体系"组成）的态投影到"体系"构成密度矩阵，由密度矩阵本征值按大小排序的态构成的"体系"的优选态。
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Based on the Hamiltonian of the interaction system, which includes the interaction between two two-level atoms and a single mode vacuum field, the state vector and the density matrix of the system, and the reduced-density matrices of the subsystems are obtained by solving its Schrodinger equation, and the basic model of this problem is established.
从两个二能级原子与单模真空场相互作用系统的哈密顿量出发，通过解Schrodinger方程，得到了系统的态矢、密度矩阵和子系统的约化密度矩阵，建立了本文的工作模型。第二章介绍了量子熵与量子纠缠的发展史，解释了量子熵与量子纠缠的关系，阐述了量子熵与量子纠缠的基本理论。第三章研究了两个二能级原子与单模真空场相互作用系统中的量子纠缠。
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The main contributions are as follows:(1) The decoherence suppression of N level Markovian systems is investigatedby the optimal control in the coherence vector representation. The N level Markoviansystem can be described by the master equation, and possesses a standard bilinear formin the coherence vector representation.
本论文利用密度矩阵相干向量表示研究了退相干效应的抑制和相应的纠缠控制问题，论文主要工作包括：(1)在密度矩阵相干向量表示下，利用最优控制研究N能级Markov系统的退相干抑制问题。N能级Markov系统可以用主方程模型描述，在相干向量表示下具有标准的双线性形式。
- 更多网络解释与密度矩阵相关的网络解释 [注：此内容来源于网络，仅供参考]
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density matrix：密度矩阵
兰道於1926年发表的第一篇论文,是以讨论双原子分子线光谱的强度为主题;一年以后,他又发表了一篇讨论量子力学中阻滞(damping)问题的论文,在这篇论文里,他提出用密度矩阵(density matrix)来描述一个量子状态(state)的方法.
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density matrix：示范矩阵
密度 density | 示范矩阵 density matrix | 牙科学 dentistry
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spin density matrix：自旋密度矩阵
spin correlation 自旋相关 | spin density matrix 自旋密度矩阵 | spin density wave 自旋密度波
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radiation density matrix：辐射密度矩阵
radiation density constant 辐射密度常数 | radiation density matrix 辐射密度矩阵 | radiation dermatitis 辐射性皮炎,放射性皮炎
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power spectral density matrix：功率谱密度矩阵
功率谱密度函数:power spectral density function | 功率谱密度矩阵:power spectral density matrix | 互谱密度函数:cross-spectral density function
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density of distribution：分布密度
density matrix 密度矩阵 | density of distribution 分布密度 | density of simultaneous distribution 联合分布密度
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dot pitch：点密度
"dot matrix","点阵" | "dot pitch","点密度" | "dot-matrix printer ","点矩阵打印机"
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Dulong-Petit law：杜隆-珀蒂定律
equipartition theorem 能量均分定理 | Dulong-Petit law 杜隆-珀蒂定律 | density matrix 密度矩阵
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density matrix renormalization group：abbr. dmrg; 密度矩阵重整化群dmrg
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permutation matrix：置换矩阵
该文提出了一种基于置换矩阵(permutation matrix)的非规则低密度奇偶校验(LDPC)码构造方法. 首先,提出了基于改进eIRA(IeIRA)算法的全局矩阵;接着,通过对全局矩阵M进行矩阵置换,生成LDPC码的校验矩阵日;研究了校验矩阵H中短圈(short cycle)长度与置换矩阵循环移位系数的关系,