量子态

Chapter 1 describes the progeess and application of quantum chemistry as well as the development and the present situation of two-state reactivity.

第一章概述了量子化学这一前沿领域的发展和应用，以及两态反应理论背景和研究现状。

Discrete absorption cross-section is directly correlated with the number of quantum excitated from base state.

离散吸收截面峰值与从基态迁移到激发态的量子数目直接相关。

It is found that, the quantum fluctuations of charge number and phase-difference in free thermal state are related to not only the parameters of the circuit, but also the temperature, and the average energy stored in the capacitance and inductance is equal to each other.

结果表明，体系中电荷数及相位差在自由热态下的量子涨落不仅和电路中器件的参数有关，而且还和温度有关，且储存于电感中的平均能量和电容中的平均能量分别相等。

Detailed analysis also shows that the principle quantum number, n, is not changed much for the Rydberg H atom at the forward scattering direction.

同时详细的研究也表明，在上述的散射过程中往前散射的方向上，氢原子里德堡态主量子数n的变化并不是很大。

In this thesis, we give a review on RMF model systematically. Combining the quake effort on the meson field introduced by Quantum meson coupling model, we reconstruct the RMF model and investigate the basic property of some nuclei.

本文首先介绍了量子强子动力学理论，这个理论是在很多地方都有成功的应用，在 QHD 基础上，引入了考虑核内结构的夸克介子耦合模型，借鉴 QMC 中对夸克介子的成功耦合，本文改进相对论平均场理论，使其更精确的计算锂等原子核的基态性质，研究中子晕等现象。

Chapter Ⅱ reviews the general theory of Stark effect from our point of view. We describe three kinds of theoretical approaches about the treatment of ac Stark effect, which are time-dependent perturbation theory in semiclassical argument; Rabi methods in the semiclassical theory; dressedstate approach---quantum treatment of the light field. We also compare and discuss their scope of application.

第二章从我们自己的观点出发，总结了理论研究ac Stark效应的三种不同的方法：半经典的与时间有关的微扰方法；半经典的Rabi方法；对光场进行量子化处理的Dress态理论方法，比较并讨论了这三种方法各自的适用范围。

The generating origin of the light field with SPDC expounded with the interaction of the pumping photons with the nonlinear crystals.

分析了单色泵浦光子流和量子真空噪声对非线性晶体的综合作用，从泵浦光与非线性晶体的相互作用过程解释了自发参量下转换光场的产生根源，推导了SPDC双光子态的数学表达式，并给出其几率解释

The research ofthis field is at the beginning in our country,and less than that in foreign country.There are no more experimental works on SPDC in our country.The other reason thatI want to devote myself into this field during my Ph.D.is to fulfill the blank in ourcountry and to catch up with the other country.

量子通信的实验研究在国内起步较晚，实验与国外的差距较大，利用双光子纠缠态的实验研究目前在国内基本上是一片空白，本人将该领域的研究作为博士论文研究课题，旨在填补国内空白，缩小差距。

The binding energy of reactants and products was determined by X-ray spectrography, the ground level charge distribution of products was caculated by density function theory of quantum chemistry.

采用X-射线光谱仪测定反应物及反应产物的结合能，用量子化学密度泛函理论计算各反应产物的基态电荷分布情况。

In the specific quantum numbers configuration of holon-isospin excitation where the excited momentum approach to the ground state, the dispersion relations can be expected as a quadratic dispersion, so we can define the effective mass of the spin wave excitation.

在激发能动量接近基态的特殊的isospin 量子数选取下，可以把色散关系看成为二次函数的形式，由此得到了有效质量与能隙、激发态动量的关系。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。