查询词典 quantum electronics

For one-dimensional mesoscopic metal rings system in external magnetic field, supposing the system has a symmetry under translation in charge space, the quantum current relation in mesoscopic metal rings is given by solving the eigenvalue equation of the current, the property of quantum current have been investigated and analysed.

针对处于外磁场中的一维介观环系统，假设在电荷空间中具有变换的对称性，通过求解电流算符的本征值方程，给出系统中的量子电流关系，分析和研究一维介观金属环中量子电流的性质。结果表明，量子电流不仅与外磁场、介观金属环参数有关，而且还明显地依赖于电荷的量子化性质

The ground-state binding energy of an exciton confined in quantum wires and quantum wells in the presence of a uniform electric field has been calculated under the effective-mass approximation using variational approach.

本文采用变分法研究了外加电场下无限深方形量子线中重空穴激子的束缚能，我们用平面波展开的方法求解在电场作用下无限深方形量子线中电子和空穴的基态能和基态波函数及低激发态的能量和波函数，并用所得到的波函数进一步计算激子的基态及低激发态的束缚能，最后计算了激子的Stark能移。

In quantum case,we ex-tend the Sklyanin's approach and find that unitarity condition of quantum R-matrix issufficient to construct commutative quantities with boundary,and its reflection equationsare obtained.

在量子情形下，我们把Sklyanin的构造方法扩充到一般的情形，即量子R矩阵只拥有幺正性条件。我们给出了此时守恒量的构造办法，及其相应的边界反射方程。

Pages: 444 This landmark among mathematics texts applies group theory to quantum mechanics, first covering unitary geometry, quantum theory, groups and their representations, then applications themselves—rotation, Lorentz, permutation groups, symmetric permutation groups, and the algebra of symmetric transformations.

页： 在数学正文中的444这标志建筑物把群论用于量力学，首先包括单位的几何学，量子理论，组和他们的表现，应用themselvesotation，洛伦茨，换变组，匀称换变组和匀称的转变的代数的然后。

Similarly, investigations on the information encoded in finite physical resources will also be helpful for improving the efficiency of state measurement, storage, etc.. This dissertation focuses on some theoretical investigations of quantum state estimation together with discrimination process, and is organized as follows. In the first chapter, we introduce some basic concepts and related background materials, including the theory of quantum operation and unitary group representation, which is helpful for understanding the following content of this dissertation.

在量子密码通信的安全性研究中，测量可获取信息直接关系到窃听能否成功，这实际上对应于量子态的操作和识别过程；在量子通信信道容量、以及态编码的研究中，考察如何利用有限的物理资源标识尽可能多的量子态信息，对提高信息测量、存储的效率都很好的指导意义。

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。

radiation field ; two-level atom ; quantum bit ; quantum logic gate:unitary transition matrix

近年来，作者研究了量子化的辐射场中的二能级原子的量子相干性

The variational relations of the first internal excited state energy,the excitation energy and the frequency of transition spectral line between the first internal excited state and the ground state of the electron which is strongly coupled with phonon in an asymmetry quantum dot with the transverse and longituainal effective confinement length of quantum dot and the electron-phonon coupling strength were studied by using a linear combination operator and the unitary transformation methods.

采用线性组合算符和幺正变换方法研究非对称量子点中与声子强耦合的电子的第一内部激发态能量、激发能量和第一内部激发态到基态的跃迁谱线频率随量子点的横向和纵向有效受限长度，电子-声子耦合强度的变化关系。

The influences of the external magnetic field on the properties of the excited state of the polaron in a parabolic quantum dot are studied by using the linear combination operator and the unitary transformation method, the relation of the first internal excited state energy E1, excited energy △E and the resonance frequency ω of both the strong-and weak-coupling polaron with the effective confinement length l0 of the quantum dot, the electron-phonon coupling strength α and external magnetic field B are derived.

采用线性组合算符和幺正变换方法研究了外场对抛物量子点中极化子的激发态性质的影响，导出了强、弱耦合情况下极化子的第一内部激发态能量E1、激发能量△E、共振频率ω与量子点的有效受限长度l0、电子－声子耦合强度α以及外场B的关系。

The unitary transformation of quantum computing process not only guarantees the reversibility of computing, at the same time it naturally produce the parallelism of computing. All these will greatly lower computing complexity, make the unrealizable computing on classical computer realizable on quantum computer.

量子计算过程的幺正性不但保证了计算的可逆性，同时也自然的产生了计算的并行性，这将极大的降低计算复杂度，使原先在经典计算机上难以实现的运算在量子计算机成为可能。

The teacher likes the honeymouthed little girl very much.

老师很喜欢这个嘴甜的小姑娘。

Mr. Notker Bien's interests are traveling, spending quality time with the family and long-distance-running.

诺特卡·柏恩先生热爱旅游，长跑，以及和家人一起共度美好时光。