1986年, 第5卷, 第4期　
刊出日期：1986-06-15

  

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  THE GENERALIZED MASTER EQUATION THEORY OF ELECTRON SCAVENGING IN AMORPHOUS SOLIDS

  文超, 刘福绥

  理论物理通讯. 1986, 5(4): 281-289.

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  Electron scavenging in amorphous solids is analyzed by using diffusion controlled reaction model. In terms of stochastic process theory, the process is an age-dependent branching process which is described by linear death process of generalized master equation.The variation of number of trapped electron with time, N(t), is calculated with Ngai's fractional exponential waiting time density for the time between hops. Quantitative comparison with Miller's pulse radiolysis experiments on frozen 6M NaOH is made and the agreement is fairly well. The rigour and simplicity in mathematics of the generalized master equation method developed here are in sharp contrast to the master equation method in which quantitative calculation can hardly be done.
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  AN APPLICATION OF NEW TRANSPORT EQUATION TO LOW-TEMPERATURE RESIS丁IVITY OF DILUTE ALLOYS⁺

  朱邦杰, 姚凯伦

  理论物理通讯. 1986, 5(4): 291-299.

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  In this paper,we present a method of calculating the low-temperature resistivity by means of the new transprt equation for manyparticle systems. With only very simple calculations, the resistivity can be easily found.Our results show that the resistivity increases with decreasing temperature and does not exhibit logarithmically divergent behwior at T=O.Compared with other calculation,the new method overcomes the defect of the divergence of the Kondo resistivity and has much simpler calcula-tion swithout solving the integral equation of nonflip T matrix. The Kondo temperature T_k is also obtained.
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  THE CHARGED PARTICLE MULTIPLICITY IN PROTON-ANTIPROTON ANNIHILATION

  陈之江, 吕景发

  理论物理通讯. 1986, 5(4): 301-310.

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  Using the three-chain diagram based on the dual partonic scheme, combining with the FF quark fragmentation mechanism, the charged particle multiplicity, the productions of Л and K mesons, the single-particle inclusive distribution and the central plateau particle density of soft high energy pp annihilation are calculated and compared with pp experiments on CERN SPS.
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  THE EFFECT OF CHARGE CARRIED BY HIGGS FIELDS ON THE PHASE STRUCTURE OF THE 4-d U(1) VARIED-MODULAR HIGGS MODEL⁺

  宋永桑, 史建民, 张跃中

  理论物理通讯. 1986, 5(4): 311-322.

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  In this paper,the phase diagram of the four-dimensional U(1) Higgs model with the charge-two and varied-modular scalar fields is simulated.The simulation is performed on a 4⁺ simple hypercubical lattice by using Monte-Carlo metnod(modified Metropolis method). Wherever the Monte Carlo simulation has been brought into play by us,the phase transitions between the broken-symmetry and the restored-symmetry phase always exist and are of first-order. Our result provides the Monte-Carlo evidence for H.Georgi's estimation again,and supports the theory in which quarks and gluons are confined exact1y.
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  DETERMINATION OF GUT SCALE AND A CLASS OF NO SCALE SUSY GUTs

  杜东生, 薛丕友, 吕景发

  理论物理通讯. 1986, 5(4): 323-330.

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  The GUT scale is determed in supersymmetric grand unified models.It is obtained naturally that there is only one heavy scale.So we can construct a class of no scale SUSY GUTS in which the gravitino mass,m_3/2=O(m_w) and m_w is determined by radiative corrections.
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  PASTOCHASTIC INSTABILITY IN HOT ELECTRON PLASMA

  王中天

  理论物理通讯. 1986, 5(4): 331-337.

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  Secular perturbation theory is used to describe the hot electron motion in an inhomogeneous magnetic field. A group of precessional modes is investigated. A criterion for determining the stochastic instability is obtained. It is found that higher precessional frequencies have more stabilizing effects.
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  THE DYNAMICS OF LARGE SCALE NEURON-GLIA NETWORK AND ITS RELATIDN TO THE BRAIN FUNCTIONS(I)

  徐京华, 李薇

  理论物理通讯. 1986, 5(4): 339-346.

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  A careful analysis of EEG of a conscious humanbeing shows that apart from some regular frequencies there also exist noise-like acitivities which are indications of the chaotic states or strange attractors as the results of complex couplings among the oscillators in the neuronetworks. The conventional mathematical models of large scale neuronetworks, i.e. considering only excitatory and inhibitory neurons do not lead to chaos but to some stationary states or limiting cycles. We Propose a new mathematical model,besides the fast electric activities of the excitatory and inhibitory neurons, containing also the modulation actions of neurological cells. This new model shows the chaotic behaviors. As we know, the appearance of strange attractors means that the system possesses some Lyayunov Exponents with positive real parts, which are the information sources. On the ground of this finding we try to give a neuroglia modulation hypothesis of human conscious mind formation.
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  CDW CONDUCTION IN THE TRANSITION METAL TRICHALCOGENIDES

  郭儒

  理论物理通讯. 1986, 5(4): 347-350.

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  It is shown that solitons exist in a system of the pinning CDW. They are responsible for the periodic current noise. The dependence of the nonlinear conductivity on an applying field ε is calculated as ε exceeds a threshold value ε_T.
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  THE CRITICAL TEMPERATURE OF SUPERFLUID HELIUM AND THE FRACTION OF NONZERO MOMENTUM COPJDENSATION

  倪光炯, 李兆平, 石青飚

  理论物理通讯. 1986, 5(4): 351-357.

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  Using the method of momentum nonconserved Green function,we derive a critical temperature value T^(l)=2.71°K for ⁴He system below which the system undergoes a phase transition and has a nonuniform condensate.The temperature dependepce of the speed of the first sound near T=0°K is also discussqd.
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  DERIVATION OF THE ANOMALOUS TERM IN VIRASORO ALGEBRA BY TOPOLOGICAL METHOD

  吴岳良, 谢彦波, 周光召

  理论物理通讯. 1986, 5(4): 359-364.

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  A 2-cocycle is constructed which gives the anomalous term in the Virasoro algebra.