TOPOLOGICAL ACTION RELATIONG TO BERRY'S PHASE AND NON-ADIABATIC EFFECTS

In non-adiabatic cases the topological action assocaiated with Berry's phase and the corresp onding effective Hamiltonian are obtained by path-integral method.We also give the non-adiabatic transition probability amplitude in the first-order approximation.It is thereby shown that the Berry's phase and the induced gauge structure have universality of existence.As an example,dynamics of induced monople relating to the Bitter-Dubber's experiment is analysed in terms of induced gauge field.     

A CLASSICAL MODLE OF QUANTUM BERRY'S PHASE FACTOR

Considering that the classical evolution equations are similar to the Schrodinger eqaution,we point out that there is the structure of the Berry's Phase in the solution of a classical evolution eqaution with adiabatic changing parameters.Thus,we can use a classical evolution process to imitate the quantum adiabatic process.As an example,the motion of a charged particle in slowly-changing magnetic field is studied and the corresponding phase factor can be interpreted as a holomony of the fiber bundle on the sphare s² in the parameter space.     

WARD IDENTITIES IN PHASE SPACE AND THEIR APPLICATIONS

Starting from the phase space path integral, we have derived the Ward identities in canonical formalism for a system with regular and singular Lagrangian. This formulation differs from the traditional discussion based on path integral in configuration space. It is pointed out that the quantum canonical equations for systems with singular Lagrangians are different from the classical ones obtained from Dirac's conjecture, The preliminary applications of Ward identities in phase space to the Yang-Mills theory are given. Some relations among the proper vertices and propagators are deduced,the PCAC, AVV vertices and generalized PCAC expressions are also obtained. We have also pointed out that some authors in their early work had ignored the treatment of the constraints.     

二相介质中的运动位错

本文考虑二相介质中与平面相界平行的匀速运动直线位错。采用了与位错相对静止的运动坐标系,在此坐标系中推广位错各向异性弹性理论的普遍方法,并利用弹性力学中的格林函数方法处理相界面,计算得到此位错在介质中所产生的总弹性场,以及其所受到的“像力”。本文所提出的理论方法有一般的适用性,结果可以用于考虑此位错与其它缺陷的相互作用,以及二相介质的力学性质。 关键词：     

ICP—AES中基体干扰效应及其机理研究：Ⅱ.干扰现象的进一步探讨

本文探讨了共存元素对碱金属以及Al对碱土金属的基体效应,测定了不同基体浓度、入射功率及载气压力时一般基体效应分布的变化,并观察了3种基体对Cd、Fe电离度的影响。在尾焰区,碱金属发射信号受到共存基体的明显增感,增感幅度随观察高度的增加而增大;Al基体对碱土金属产生抑制作用,抑制幅度随观察高度的升高而下降;基体干扰(增感或抑制)的幅度随基体浓度及载气压力的增加而增大,随入射功率的增加而减小。     

THE REFLECTION EFFECTS ON PHASE MEASUREMENT AND PHASE CONTROL IN RF SYSTEM OF BPL

In this paper the reflection effects which appeared in RF system of BPL on the phase measurement and phase control are described. Some mathematical expressions about the effects are obtained. A concret method reducing the reflection effects is presented.     

量子力学相位因子

文章以电磁场为例说明规范场和相位因子的关系,说明相位因子何以是20世纪物理学的旋律之一,文章就目前文献或教材中流行着的一些量子力学相位概念作分析,指出必须区分清楚不可积相位和可积相位,文章还专门讨论了不可积相位的概念及其重要性。     

MOVING GRATING AND ITS PHASE SHIFT IN LiNbO_3:Fe CRYSTAL

Spatial phase shift of moving grating in LiNbO_3:Fe crystal iscalculated on the basis of photorefractive dynamic equations.It is shown that themoving grating is a self-established phase grating that generates backward dynamiclight scattering.     

运动折射率相位栅和背向光折变散射

本文按照Kukhtarev的光折变理论讨论了在LiNbO₃:Fe晶体内自发形成的运动折射率相位栅和由它所引起的强烈的背向光折变散射。 关键词：     

NORMALLY ORDERED FORMS OF SHAPIRO-WAGNER PHASE OPERATORS AND THEIR APPLICATION

Based on the quantum mechanical representation |ξ〉=exp[\dfrac12|ξ|+ξ a⁺₁+ξ^* a⁺₂-a⁺₁a⁺₂]|00〉constructed by Fan Hong-yi and with the help of the technique of integration within an ordered product of operators, we derive the normally ordered expressions of the Shapiro-Wagner (SW) phase operators. They are in terms of the Bessel functions. As their application we discuss the minimal uncertain relation regarding the two-mode phase and number-difference operators.     

激光窗口形状对应力和光束位相影响的数值计算

 计算对流冷却下500kW DF激光器CaF₂输出窗口的温升,得到了平板形和球壳形输出窗口的应力分布和光束的位相分布;分析了窗口形状对应力和位相分布的影响。     

非晶态InSb及其亚稳中间相的霍耳效应和超导电性

实验研究了非晶态InSb及其结晶相变过程中的霍耳效应。结果表明,金属型非晶态InSb以电子导电为主,半导体型非晶态InSb以空穴导电为主;金属型非晶态InSb中的第一电导跃变是一种由类液非晶态到类点阵非晶态的结构弛豫过程;第三电导跃变是富In或富Sb固溶体相在半导体InSb晶界上析出并集中所引起的;金属型非晶态InSb的三种不同的结晶相变类型具有鲜明不同的输运性质;第二电导跃变峰所对应的亚稳金属相超导T_c的提高,可能主要起因于电子浓度的增加。 关键词：     

PHASE OPERRTORS FOR ATOMIC SYSTEM IN SCHWINGER BOSON REPRESENTATION AND THEIR PROPERTIES

In terms of the Schwinger boson representation of angular momentum We introduce suitable phase operators which exhibit similar properties to those of the phase operators in radiation field into atomic system. With the help of them angular momentum's third component phase uncertainty relation are discussed. Also, the eigenstates of the Hermitian phase operator are derived.     

非晶态InSb及其亚稳中间相的霍耳效应和超导电性

实验研究了非晶态InSb及其结晶相变过程中的霍耳效应. 结果表明, 金属型非晶态InSb以电子导电为主, 半导体型非晶态InSb 以空穴导电为主; 金属型非晶态InSb中的第一电导跃变是一种由类液非晶态到类点阵非晶态的结构弛豫过程; 第三电导跃变是富In或富Sb 固溶体相在半导体InSb 晶界上析出并集中所引起的; 金属型非晶态I站b 的三种不同的结晶相变类型具有鲜明不同的输运性质; 第二电导跃变峰所对应的亚稳金属相超导Tc的提高, 可能主要起因于电子浓度的增加. 关键词：     

低温凝聚InSb膜相变过程中的时间效应和超导电性

本文研究了低温凝聚InSb膜相变过程中出现的时间效应和超导电性,获得了几个重要结果:(a)低温凝聚InSb膜从发生第一次电导跃变以后到第二次电导跃变之前,样品处于同一非晶金属态,并且具有相同的超导转变温度T_c;(b)T_c和退火温度T_a的关系十分类似于电导随T_a的变化关系;(c)随着第二次电导峰值后的电导下降,在某些特殊的相变区R(T)超导转变中,样品由完全的超导电性逐渐过渡到部分的超导电性;(d)相变过程中存在显著的时 关键词：     

运动光栅的量子特性研究

讨论了空间周期结构和时间周期性对波和物质波的作用，即动量和能量的量子化变化，并用傅里叶分析和相对论的方法对其进行了分析论证，提出了一种对于运动和物体相互作用在概念上的处理方法。     

烧结型多晶金刚石中晶界物相的类型与数量对其某些物性的影响

 烧结型多晶金刚石可分为有或无添加剂两种，本文只讨论前一种，研究烧结型PCD晶界中的物相和数量对相对耐磨性、强度和热稳定性的影响。试验发现，在晶界中形成的中间过渡物相的数量与相对耐磨性有关，而中间过渡物相的类型与热稳定性有关。     

多晶铁电薄膜的相变——应力和晶粒尺寸效应

用掠入射X射线衍射法观察到钛酸铅多晶铁电薄膜表面层与体内的相变温度不同,表面层的结构参数也有异于体内;唯象地把多晶铁电薄膜抽象为一个表面层为细晶粒、低应变层,体内为粗晶粒、高应变层的两层结构,根据应力和晶粒尺寸效应对铁电相变的影响,解释了钛酸铅多晶铁电薄膜的相变特征 关键词：     

微观偏析对凝固传热传质数值模拟的影响

总结比较了多种微观偏析模型,并针对反向凝固工艺实验研究的传热传质现象进行了数值模拟。讨论分析了溶 质的重新分布对宏观凝固传输过程数值模拟的影响,并与实验数据进行了比较,认为微尺度固液相界面上的溶质再分配对 新生相生长的影响不可忽略。