1982年, 第1卷, 第2期　
刊出日期：1982-03-30

  

• 全选
  |

• Select
  A TIGHT-BINDING CALCULATION OF LAYERED ULTRTHIN COHERENT STRUCTURES(LUCS)

  熊诗杰, 蔡建华

  理论物理通讯. 1982, 1(2): 117-130.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  The present article describes the calculation of the sub-band structure and atomic plane projected model of newly reported artificial materials,Layered Ultrathin Coherent Strucures (LUCS),by means of the Green's function method in the tight-binding approximation while only taking into account the nearest neighbor matrix elements.A formulation of a more accurate method for he same purpose,in terms of linear combinations of muffin-tin orbitals and interface plane wave orbitals is given in the appendix.
• Select
  INVESTIGATIONS OF ELECTRONIC STATES OF SEMICONDUCTOR SURFACE AND INTERFACE BY THE CHARGE SELF-CONSISTENT EXTENDED HÜCKEL METHOD

  谢希德, 张开明, 叶令

  理论物理通讯. 1982, 1(2): 131-146.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  In the present work the group III-metal chemisorptions on both elementary and compound semiconductor surfaces are studied by the cluster model and the charge self-consistent extended Hukel method. Through the calculations,information about the adsorbed sites, charge transfers and the Local densities of states could be obtained.Since the electonic states of the chemisorptions are local, the rusult obtained even by small chusters are in reasonable agreement with those by experiment.
• Select
  HIGH ENERGY SCATTERING THEORY AND COLLECTIVE COORDINATE

  张禹顺, 李扬国, 王维维, 阮图南

  理论物理通讯. 1982, 1(2): 147-156.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  In this paper, by the collective coordinate of A. Bohr, the scattering amp1itudes of two cornpusite many-particle systems can be obtained. And the collective excitation for two complex many-particle systems in the scattering process is discussed.
• Select
  A MODIFICATION OF THE METHOD FOR SOLVING THE FADDEEV EQUATION

  储连元, 蔡任泰

  理论物理通讯. 1982, 1(2): 157-164.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  We have proposed a new method of solving the Faddeev equations, so that the higher partial wave components can be solved uniquely as the lower partial wave components.
• Select
  THE INFLUENCE OF NUCLEAR DENSITY OSCILLATION ON PIONIC ATOM

  王必正

  理论物理通讯. 1982, 1(2): 165-176.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  We considered the nuclear density oscillation in the picnic atom. It has been found that the density oscillation has no effect on the eigenvalue owing to the electromagnetic interaction between the pion and nucleus. However, the energy shifts due to the strong interaction, depend on the oscillation parmeters of the nuclei. We have taken the oscillation parameters which are compared with theoretical calculation, and obtained better calculation,results of the strong interraction energy shiftsin the pionic atom as compared with experimental ones.
• Select
  QUARKONIUN POTENTIAL MODEL WITH A NON-ZERO GLUON EFFECTIVE MASS

  何祚庥, 林大航, 赵培贞

  理论物理通讯. 1982, 1(2): 177-183.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  According to Parisi's suggestion, we assume that the gluon possesses a non-zero effective mass μ. From the assumption we derive an effective Hamiltonian up to order β₂ for quarbnium. For μ=0.8GeV and 0.4 GeV, we find the spectra as well as the relative leptonic widths for charmonium upsilon, which are in good agreement with experiment.
• Select
  THE H_n SIGMA-MODELS AND SELF-DUAL SU(n) YANG-MILLS FIELDS IN FOUR-DIMENSIONAL EUCLIDEAN SFACE

  周光召, 宋行长

  理论物理通讯. 1982, 1(2): 185-203.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  The H_n σ-models. i.e., non-linear σ-models taking-values on the symetric coset space SL(n,c)/SU(n), both in two-dimensional and four-dimensional Euclidean space,.are formulated. The relations with self-duel SU(n) Yang-Mills fields are also discussed.
• Select
  A FURTHER DISCSSION on THE GAUGE HIERARCHY

  汪克林, 鲍钖明, 刘祖卫, 陈林

  理论物理通讯. 1982, 1(2): 205-211.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  In this paper we have calulated the Higgs potential with the one-loop correction in the SU(3) and SU(5) gauge models. The result shows that the arbitrary gauge hierarchy is doubtful in the peiturbation theory. This is in contrdiction with the conclusion obtained by Mohaptra et al.
• Select
  CHARGE ASYMMETRY AND THE Z⁰ BOSON MASS IN UNPOLARIZED e⁺e^-→μ⁺μ^- REACTION

  胡连

  理论物理通讯. 1982, 1(2): 213-220.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  Department of Physics, Zhongshan University, Guangzhou, China
• Select
  ON THE NEUTRINO MASS, THE ABUNDANCE OF RIGHT-HANDED NEUTRINO AND THE CLOSENESS OF THE UNIVERSE

  庆承瑞, 吴泳时, 何祚庥, 张肇西, 邹振隆

  理论物理通讯. 1982, 1(2): 221-227.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  We point out that although the neutrino mass is finite,the left-handed neutrino density still dominates over the righthanded one in the universe unless there exists one or more elementary fernions (quark or lepton) whose mass is larger than 10⁶ GeV. or M_WR/M_WL≤10². (M_WLand M_WR are the left and right handed intermediate boson respectively.If there exists neutrino the mass of which is about 34 ev. as indicated in some experiments, then one can conclude that the total neutrino mass of the universe s,bvld contribute abput 99%. to the whole masses and lead to the closeness of the universe.This conclusion can be brought to the agreement of all observation datd which have been-obtained so far. A mass limit of all species of neutrinos obtained by reexamining all data is ≤ 200 eV.
• Select
  "WHIMPERS" IN SELF-SIMILAR COSMOLOGIES

  吴忠超

  理论物理通讯. 1982, 1(2): 229-236.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  We examine how self-similarity influences the occurrence & nature of singularities in self-similar cosmologies. There exists a density divergence due to a conformal factor in any Self-similar model. If we discuss the singularity problem in an "unphysical" homogeneous model which is conformally related to the self-similar model, it is easy to show-that in a Class D model with -36/2, singularity bebaviour is similar to that in homogeneous comrologies; The Boyer-Ehlers analysis of Killing geodesicsic has been generalized to the self-similar case. Some new Penrosediagrams are given.
• Select
  A FINITE TEMPERATURE λφ⁴ MODEL AND DE SITTER-FRIEDMANN PHASE TRANSITION IN THE EARLY UNIVERSE

  郭汉英, 邹振隆

  理论物理通讯. 1982, 1(2): 237-243.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  In this paper, we propose a simple finite temperature λφ⁴ cosmological model to show that a new type singularity free cosmological model could be established by taing a series of impoftant quantum and statistical effects into consideration such as spontaneoui rymetry breaking, trace anomaly and pirtide creation, symmetry restoration at hish temperature through.phase transition and others. To begin with, the state of the universe would be a cold singu1arity.free and horizon free Beltrami-Anti de Sitter one rather than a hot one. Then associated with the,particle creatipl, the temperature would, become higher and higher and as soon. as the temperature reached a critical value, T_c a second-order phase transition would take place and the universe would transfer to a hot radiation dominated Friedmann state.
• Select
  CHROMATICITY IN STRONG FOCUSING ACCELERATORS AND STORAGE RINGS

  陈森玉, 方守贤, 张闯

  理论物理通讯. 1982, 1(2): 245-254.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  The chromaticity formulae with accuracy to the first-order in momentum deviation in strong focusing accelerators & storage rings have been derived. It has been found that the edge magnetic field effects must be taken into account, otherwise the resultant errors intr$duced.will be appreciable which increase rapidly with the decrease in machine size. They can not be neglected especially for proton and antiproton accumulators due to the very large momentum spreah of the beams accumulated in them.
• Select
  THE REPRESENTATION THEORY in QUANTUM MECHANICS with NEGATIVE METRIC

  阮图南, 范洪义

  理论物理通讯. 1982, 1(2): 255-266.

  摘要 ( ) PDF全文 ( )   可视化   收藏

  In this paper the coherent state for the negative metric boson is established, which, originating from its particle number representation provides a basis for constructing its coordinate and nomenturn representations in the Euclidean space. However,it is demonstrated by us that these two representations do not exist in the Minkowski space. Thus this formulation provides a physical foundation for the path integral quantiration theory of the negative metric boson in the Euclidean space.