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A model for the description of displacive phenomena in one-dimensional uniaxial hydrogen-bonded ferroelectrics with long-range dipolar interactions, is proposed in the framework of the microscopic theory. A continuum dynamic equation is found for the variation of the quantum coherent state...
Various problems and limitations of a recent Coulomb-fluctuation model by Bondarev and Pikhitsa (Phys. Lett. A 196 (1994) 247) for the transient and frequency response of disordered conductors are considered. The model can be expressed in terms of a simple Gaussian distribution of activation...
The causal theory for the coherent state representation of quantum mechanics is derived. The general conditions for the classical limit are given and it is shown that phase space classical mechanics can be obtained as a limit even for stationary states, in contrast to the de Broglie-Bohm quantum...
The classical Poisson structures and r -matrices for the geodesic flow in R N and the G 0 -constrained Harry-Dym flow are studied. The integrabilities of the constrained flows are obtained in the r -matrix setting.
Single differential (SDCS) and total (TCS) cross sections are calculated for the single ionization process of a helium atom by positron impact in the intermediate and high energy range (50–300 eV). To study the charge asymmetry, cross sections for electron impact ionization are also presented...
A stochastic formulation of open quantum systems is applied to a microscopic system-meter-reservoir model of quantum measurement. The quantum statistical variance is decomposed into two variances which allow a quantitative description of the transformation from quantum to classical probabilities...
It is shown that the statements of Macdonald (Phys. Lett. A 220 (1996) 351) about the contradictoriness of the results of our previous paper (Phys. Lett. A 196 (1994) 247) and the difficulties connected with the use of these results for a consistent quantitative interpretation of experimental...
A general solution of the exchange-transfer problem is given for an arbitrary nuclearity mixed valence cluster with one delocalized electron over identical high-spin cores. The matrix elements of the second order exchange-transfer operator are expressed in terms of the products of 6 j -symbols...
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