查询词典 quantum state

Through the Radon transformation of the normally ordered Wigner operator we introduce two mutually conjugate intermediate coordinate- momentum representations. Based on them we construct the appropriate quantum phase space theory which includes the new Wigner operator adapting to this space and construct the appropriate generalized Fredholm operator equation and then find its solution. We then deriving the Hermite polynomials operator identities by applying the Fredholm equation. We also reveal the connection between the generalized Wigner operator and the 2-dimension normal distribution in statistics, which is useful to study the quantum tomogram. As the application of the entanglement Husimi operator theory we calculate the Wigner function and the Husimi function of the one- and two-mode combination squeezed state , study their characters through drawing the three-dimensional graphics.

由正规序Wigner算符的拉登变换引入了两个互为共轭的中介坐标-动量表象，在此基础上我们建立了相应的量子相空间理论，其中包括引入适合该空间的新的Wigner算符；并在该表象的基础上，建立了广义Fredholm算符方程，求出了它的解，并运用该方程导出有关厄米多项式的算符公式；揭示广义Wigner算符与统计学中的随机变量的二维正态分布形式上的相似，这对于研究量子态的tomogram(是英文Tomography的派生词)有用。

At the end of this chapter a concrete calculation example of Gauge transformation is given.In chapter 2 of this paper, two example applying gauge transformation for Quantum Geometric Phase in adiabatic condition are given, with explicit calculation process .The two examples is similar in objects to calculate, they are two state quantum system expressed in sphere coordination.

第二章主要讲了两个利用含时规范变换求解绝热近似下的几何相的例子，给出比较具体的计算步骤，它们有一个共同特点就是计算的对象都是二态体系，计算时采用的都是球坐标系，计算的都是只有两个量子态的纯粹的量子系统。

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。

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。

By making use of the quantum canonic ensemble theory,the quantum fluctuations of a mesoscopic RLC circuit in the mixed state have been studied.

利用量子正则系综理论研究了介观RLC电路在混合态下的量子涨落。

The quantum size effect of a very small thickness circular disclike GaAs quantum dot on exciton's ground state binding energy and the electron-hole distance are studied by using calculus of variations.

利用变分法研究了有很小厚度圆盘形GaAs量子点模型中激子的基态结合能，及电子-空穴间距随量子点尺寸变化的规律。

In the first part, it describe the two-level system with the quantum mechanics which include the dress state picture, the adiabatic description of the interaction and the mathematic method; In the second part, it tell us that using the shaping-pulse how to manipulate the quantum coherent control, chip field and tanh field are invested.

第一部分二能级系统的量子描述在这一部分中详细推导了缀饰态表象中量子态的描述，重点介绍了绝热条件下的布洛赫矢量的表达式，以及求解布洛赫矢量的方法。

The quantum entanglement in a system which is composed of two entangled atoms interacting with the squeezed coherent state is studied by means of the full quantum theory. The influences of the coherent amplitude factor, the squeezing factor, the ratio of two coupling coefficients on the entanglement property are discussed.

利用全量子理论，研究了双原子与压缩相干态光场相互作用系统的量子纠缠特性，分别讨论了相干态振幅参量、光场压缩参量和耦合系数比值对系统场熵和原子相对熵演化的影响。

Chapter 3 is devoted to the derivation of the master equation for the system. We find that the depasing time T2Q PCis about 100 ns when the spin decoherence is only induced by the QPC, and the repeated QPC measurement will slow down the transition rate between spin states which can be interpreted in terms of quantum Zeno effect.Meanwhile, we also study the effect of QPC measurement on two-electron spin state in double quantum dot system.

推导了系统的有效哈密顿量以及主方程、计算了测量过程中电子自旋态的演化行为；随后通过计算分析，我们发现QPC测量引起的退相干时间T2Q PC约为100ns以及高频重复的QPC测量会减缓电子自旋态之间的演化、局域系统在其初态，表现出量子Zeno效应。

It is related to two specific generalized quantum probability amplitudes in the quantum measurement for the specific state.

它是指具体量子测量中两个推广几率幅之间的相干性。

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。