1986年, 第6卷, 第4期　
刊出日期：1986-12-15

  

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  THERMODYNAMIC PERTURBATION THEORY FOR INTERMEDIATE VALENCE SYSTEMS WITH TWO MAGNETIC CONFIGURATIONS: GENERAL FORMALISM

  林宗涵

  理论物理通讯. 1986, 6(4): 291-300.

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  We present a generalization of thermodynamic perturbation theory to the intermediate valence systems with two magnetic configurations.
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  EFFECT OF THE INERTIAL TERM ON THE CDW TRANSPORT PROPERTIES I. ANALYTIC DEMONSTRATION FOR EXISTING OF THE SUBHARMONIC STEPS DUE TO THE INERTIAL TERM

  董锦明, 庞汉彬, 于渌

  理论物理通讯. 1986, 6(4): 301-311.

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  Including the inertial term and using the singular perturbation method, we solved analy tically the eqtiation of motion for the CDW system βφ+φ-sinφ=e₀+e₁ cosωt in the classical particle model under approximation β << 1 and e₁ << L. The existence of the subharmonic steps has thus been directly demonstrated in good agreement with the experiments on the CDW system.
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  QUANTUM FLUCTUATION OF THE ORDER PARAMETER AND THE OPTICAL ABSORPTION IN POLYACETYLENE

  苏肇冰, 王亚新, 于渌

  理论物理通讯. 1986, 6(4): 313-331.

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  We study in this paper the effects of lattice quantum fluctuations upon the order parametert in the Peierls systems by using the Green's function technique.We start from the discrete Su-Schrief fer-Heeger model with quantized phonon field and derive a coupled system of equations for the order parameter and Green's functions.It turns out that the order parameter is reduced compared with the adiabatic value but the Peierls instability survives the quantum fluctuations in agreement with,Monte Carlo results.The band-to-band optical absorption coefficient of polyacetylene with lattice fluctuation being accounted for is also calculated and compared with the experimental data.
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  ENHANCED NEUTRON EM1SSION IN HEAVY ION REACTIONS BY DIFFUSION MODEL

  陆中道, 张竟上, 冯仁发, 卓益忠

  理论物理通讯. 1986, 6(4): 333-345.

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  An extensive Smoluchowski equation with neutron emission is suggested in this paper and is analytically solved by means of van Kampen technique.The average fission rate,fission probability,the ratio of neutron emission to fission are calculated for composite nucleus ²⁴⁰PU. The time evolution of these quantities is analysed and their essential dependence on fission potential height and nuclear temperature are discussed.A fair1y substantial particle evaporation prior to fission in heavy-ion reactions can be well understood in our diffusion model.
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  ALGELRAIC PROPERTIES OF NONLINEAR σ MODEL OF SU(2) WITH W-Z TERM IN 1+1 DIMENSIONS

  戴元本, 王小林

  理论物理通讯. 1986, 6(4): 347-352.

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  Taking three Euler angles as the field variables of nonlinear σ model of SU(2),we calculated the Wess-Zumino term and showed by using canonical quantization that the chiral cuirents of this model satisfy a Kac-Moody alqebra at n equal an even intsger for arbitrary value of λ⁰.
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  PULSAR SUPERNOVA REMNANT CORRELATION

  A. Qadir, M. Rafique

  理论物理通讯. 1986, 6(4): 353-356.

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  A formula is provided to check the correla-tion of pulsars and supernova remnants,using only observable pulsar parameters.The validity of this formula depends on the assumption that the value of the initial pulsar frequency is much greater than the present value.A test for this assumption is suggested.
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  A HYBRID MAPPING OF AN ODD FERMION SYSTEM AND MANY-BODY FORCES

  潘缉智, 王如琳, 鲍诚光

  理论物理通讯. 1986, 6(4): 357-361.

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  In this paper,we derive a boson-fermion hybrid representation for the antisymmetrizer,and obtain an exact mapping of the fermion space onto a hybrid space.The results show that the effect of the antisymmetrizer appears as different kinds of many body forces among the bosons and the fermion.
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  THE CRITICAL STATE OF THE TWO-DIMEMSIONAL ALTERKATIVE BINARY SYSTEM

  杜宜瑾, 陈立溁, 严祖同

  理论物理通讯. 1986, 6(4): 363-369.

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  The equation of state and the isothermal line for the two-dimensional alternative binary system are discussed in this paper. We found the regularity of variance of the critical state with the composition of binary system, and obtained the linear relationship between the critical pressure and the critical temperature. We showed that the value of the critical coefficient is independent of the composition and coincides with the experimental data for the three-dimensional substances in quantitative 1eve1.
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  QUASILINEAR THEORY FOR A TOKAMAK PLASMA

  王中天, 陈小平, 邱孝明

  理论物理通讯. 1986, 6(4): 371-375.

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  The gyrokinetic quaailinear equations for an axisymetric geometry are derived including parallel current.A possible application to the generation of currents in a tokamak by lower hybrid waves is discussed.
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  NORMAL PRGDUCT REPRESENTATION FCR SU₃ GROUP

  范洪义

  理论物理通讯. 1986, 6(4): 377-383.

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  In terms of the properties of both the Glauber coherent state and normal product,we derive a kind of new representation-notmal product representation for the SU,group.