Mass operator of a $b$-quark in an external non-Abelian chromomagnetic field
Mass operator of a $b$-quark in an external non-Abelian chromomagnetic field
V.Ch. Zhukovskii, I.V. Mamsurov
Based on the effective Lagrangian for the $b$-quark radiative decay process, the mass operator for a $b$-quark in a background non-Abelian chromomagnetic field has been considered. The imaginary part of the mass operator, which is proportional to the $b$-quark radiative decay rate, has been calculated in the one-loop approximation with due regard for the background field.
Show AbstractOn thermal mode on-line control of electronic integrated circuits
On thermal mode on-line control of electronic integrated circuits
B.I. Volkov, E.B. Postnikov, Yu.P. Pyt'ev
The problem of effective positioning of temperature-sensitive elements for temperature control in powerful integrated circuits has been solved by the mathematical modeling method based on the computing-measuring systems.
Show Abstract"Complete experiment" in studying autoionization states in atoms using polarized electrons and polarized targets
"Complete experiment" in studying autoionization states in atoms using polarized electrons and polarized targets
V.V. Balashov
A set of experiments has been proposed for model-independent evaluation of the amplitudes of autoionization state excitation by electron shock in atoms.
Show AbstractBright and dark quadratic solitons of the envelope at frequency multiplicity
Bright and dark quadratic solitons of the envelope at frequency multiplicity
S.V. Derevyankin, A.P. Sukhorukov
The cases of pumping at a high $\omega_3$ and a low $\omega_2$ frequency have been studied. The properties of kink at the third harmonic frequency and of bright solitons at the first and second harmonic frequencies have been considered. The envelopes for high-frequency kinks at various relationships between the group velocities and the nonlinear distortion factors of the two three-frequency parametric interaction channels have been calculated by the numerical methods. The low-perturbation method describing the behavior of wave amplitudes at infinity has been suggested.
Show AbstractCrossluminescence in the tight-binding approximation
Crossluminescence in the tight-binding approximation
A.N. Vasil'ev, 0.1. Baum
Theoretical models describing crossluminescence spectra in the tight-binding approximation, the free and localized core hole model in particular, are studied. For the latter model, one- and two-node localizations are considered. Changes in crossluminescence spectra determined by model parameter variations are analyzed.
Show AbstractSurface and edge plasmon-polaritons and ring-shaped speckles
Surface and edge plasmon-polaritons and ring-shaped speckles
Yu.V. Vasil'ev, A.V. Kozar', E.F. Kuritsyna, A.E. Luk'yanov
A new speckle optics phenomenon has been experimentally discovered: local resonance amplification of ring-shaped edge laser speckles. The phenomenon is explained by the excitation and quenching of surface and edge plasmonpolaritons on the straight sharp edge of a blade in a laser beam.
Show AbstractBinding energy-interatomic distance correlation between crystals and atomic clusters
Binding energy-interatomic distance correlation between crystals and atomic clusters
D.V. Tsivlin, V.S. Stepanyuk, N.A. Levanov, V.Hergert, A. A. Katsnelson
The dependences of basic characteristics of octahedral clusters on their atomic numbers have been studied theoretically for ten elementary and transition fee metals. Their similarity to the same dependences for crystals has been established. This similarity gives grounds to regard an octahedral cluster as an elementary structural unit of a crystal, which carries extremely important information about the nature of interatomic interactions in a crystal.
Show AbstractОб одном обобщении теоремы Гильберта
Об одном обобщении теоремы Гильберта
А.В. Бадьин
Рассматриваются поверхности с постоянной отрицательной внешней кривизной и отрицательной, отделенной от нуля внутренней кривизной в трехмерных римановых пространствах. Доказывается аналог теоремы Гильберта о поверхностях постоянной отрицательной кривизны в трехмерном евклидовом пространстве. Обсуждается вопрос о существенности условий доказанной теоремы. Предложен алгоритм построения контрпримера в случае, когда одно из условий нарушено.
Show AbstractВозможности исследования корреляций электронов в экспериментах по однократной ионизации атомов электронным ударом
Возможности исследования корреляций электронов в экспериментах по однократной ионизации атомов электронным ударом
К.А. Кузаков, Ю.В. Попов
Исследуется поведение дифференциальных сечений реакций $A(e,2e)A^+$ и $A(e,2e)A^{+*}$ в гелии в зависимости от типа волновой функции атома. Теоретические расчеты этих сечений показали, что результаты $(e,2e)^*$-экспериментов с возбуждением иона-остатка дают возможность делать по крайней мере качественные заключения о характере межэлектронных корреляций, учитываемых явно в волновой функции мишени.
Show AbstractA static spherical-symmetric model in the scalar-tensor theory of gravitation
A static spherical-symmetric model in the scalar-tensor theory of gravitation
V.I. Denisov, J.J. Hernandez
A system of nonlinear differential equations in a new-type scalar-tensor gravitation theory in the case of a static spherical-symmetric source has been integrated. A post-Newtonian expansion of the solution has been developed. The theory predictions have been shown to agree with the results of all the experiments carried out in the Solar System's weak gravitational field. The essential difference between the metric obtained and the Schwarzschild metric in the strong field region has been demonstrated.
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