查询词典 unitary

Using the linear-combination operator and unitary transformation methods, the vibrational frequency and the ground-state energy of weak-coupling polarons are obtained.

采用线性组合算符和幺正变换的方法得到了弱耦合极化子的振动频率和基态能量。

The properties of strong coupling magnetoploron in the semiconductor quantum dot are investigated by the linear combination operator and unitary transformation methods.

采用线形组合算符和么正变换研究了磁场对半导体量子点中强耦合磁极化子基态的影响。

With the use of linear-combination operator and unitary transformation method,the influence of the dispersion of phonons on the properties of weak-coupling magnetopolaron in a parabolic quantum dot is studied.

利用线性组合算符和幺正变换的方法，研究声子色散对磁场中抛物量子点弱耦合磁极化子性质的影响。

The vibrational frequency and the mean number of phonons of surface polaron are derived by using improved linear combination operator and unitary transformation method.

采用Tokuda改进的线性组合算符和幺正变换方法导出了表面极化子的振动频率和声子平均数，讨论了多原子晶体中强耦合表面极化子的振动频率和声子平均数与拉格朗日乘子u和电子—声子耦合参数α的关系。

Russell([17]) has showed that, a compact perturbation, generated from unitary operator groups in infinite-dimensional linear Hilbert spaces, is unable to make the perturbed semigroup exponentially stable.

Russell([17])曾指出，无限维Hilbert空间中的酉算子群对生成的紧扰动不能使被扰动半群具有指数稳定性。

Using generalized Grover's algorithm of multiple marked states, and by designing a proper unitary operator, we propose a scheme for synthesizing quantum superpositions, and realize the scheme to synthesize NMR analogues of Einstein-Podolsky-Rosen states (pseudo-EPR states).

利用多标记态情况的广义Grover算法，我们通过选择适当的幺正变换，提出了合成量子叠加态的方案，并在实验上合成了赝EPR态。

Considering interaction between phonons and electron spin and using unitary transformation and linear combination operator method, studied is influence of electron spin on energy magnetic field effect of weak-coupling 2-D spin magnetopolaron in SiC.

在考虑声子之间相互作用和电子自旋的情况下，应用么正变换和线性组合算符法研究了电子自旋对SiC半导体弱耦合二维自旋磁极化子能量磁场效应的影响。

The main contents are as follows.1 For the state control problem in closed quantum systems, according to the distance between states, the error between states and the average value of an imaginary mechanical quantity, three Lyapunov functions are chosen, respectively. The corresponding control law designs and the convergence analyses are studied. Especially, for the Lyapunov function based on the distance between states, a class of control laws that can solve the problem that an initial state is orthogonal to a goal state is designed. The convergence of the system is analyzed via LaSalle\'s principle and one method to find the largest invariant set of the closed loop system is proposed by linearizing the unitary evolution operator at the corresponding instants.

在这一背景下，本论文在指出研究量子系统控制的必要性、回顾量子系统控制理论和方法的研究现状的基础上，从控制理论的角度研究Lyapunov理论和最优控制理论对于封闭量子系统的应用以及开放系统中的若干问题，主要内容包含以下几个方面。1针对封闭量子系统中的状态控制问题，根据状态间的距离、状态间的偏差、一个虚拟力学量的均值，分别选择三种Lyapunov函数进行相应的控制律设计和收敛性分析。

The first excitation energy and the mean number of the weak-coupling magnetopolarons in the polyatomic semi-infinite polar crystals were studied by using a linear-combination operator and unitary transformation methods.

采用线性组合算符和么正变换，研究磁场中多原子半无限极性晶体中电子和光学声子弱耦合相互作用所产生的极化子的第一激发态能量及平均声子数。

In order to solve exactly the dynamic problems of the double coordinate coupling harmonic oscillators, the quantum unitary operator corresponding with classical canonical transformation is derived using the momentum eigenvector in Fock representation by constructing asymmetric integration.

为了精确求解双模坐标耦合谐振子体系的动力学问题，利用动量本征矢在Fock表象中的表示构造不对称积分，找到了与经典正则变换对应的量子么正算符。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失