Specific heat of Ni$_{x}$Co$_1-{x}$Cl$_{2}$ compounds at low temperatures
Specific heat of Ni$_{x}$Co$_1-{x}$Cl$_{2}$ compounds at low temperatures
M.O. Kostryukova, T.G. Sokolovskaya
The specific heat of three compounds Ni$_{x}$Co$_{1-x}$Cl$_{2}$ with x = 0.10, 0.18, and 0.90 in the temperature range 2-27 К is measured. Together with previous measurements on NiCl$_{2}$ and CoCl$_{2}$, the results are compared with the theory of spin waves of laminar antiferromagnets.
Show AbstractEinstein's equations as identities in the theory of direct gravitational interaction
Einstein's equations as identities in the theory of direct gravitational interaction
A.Yu. Turуgin
Specific form is given to the action and, correspondingly, the effective metric for a trial particle constructed in an earlier work. It is shown that this metric identically satisfies the Einstein equations at each step of the iteration.
Show AbstractOn the quasioptimal interruption of iterative regularizatfon process
On the quasioptimal interruption of iterative regularizatfon process
Glaskо V.В., Kriksin Yu.A.
The concept of quasi-optimal approximation is generalized to iteration solution of an operator equation. It is proved that the quasi-optimal choice of the number of iterations generates a stochastically regularizing(according to Tikhonov) algorithm.
Show AbstractOn the differences of absorption and excitation spectra of dye-stuff solutions.
On the differences of absorption and excitation spectra of dye-stuff solutions.
L.V. Levshin, M.G. Reva, B.D. Ryzhikov, S.I. Stal'makhоvich
We present a scheme for the formation of inhomogeneously broadened spectra which, by including the dependence of the quantum yield of luminescence on the fluctuations of frequency of the 0-0 transitions, makes it possible to explain the observed differences in the absorption and excitation spectra.
Show AbstractOn the method of cancellation of the infrared divergences in quantum electrodynamics
On the method of cancellation of the infrared divergences in quantum electrodynamics
Воrue V.Yu., II'in V.A., Slavnov D.A.
We obtain formulas for the scattering cross section in quantum electrodynamics, which are free from infrared divergencies. The cross section is expressed in terms of the number operators of the registered particles. This obviates the necessity for summation over soft photons in the final state, as it is effectively taken into account in the formula. We analyze the dependence of the inclusive scattering cross sections on small variations of the initial states.
Show AbstractParametrical interaction of gravitational and electromagnetic radiation
Parametrical interaction of gravitational and electromagnetic radiation
V.I. Grigoriev
We discuss the generation of electromagnetic waves during the propagation of gravitational waves in matter, and estimate the parameters of the electromagnetic waves which are created during the propagation of gravitational radiation from far extraterrestrial sources.
Show AbstractOptimal control of wave front and time profile of optical irradiation spreading in nonlinear medium
Optimal control of wave front and time profile of optical irradiation spreading in nonlinear medium
Yu.N. Karamzin, A.P. Sukhorukov, V.A. Trоfimоv
We develop an algorithm for the optimization of parameters of optical radiation propagating in media with various nonlinearity mechanisms. The convergence of the algorithm is analyzed. We optimize the focusing of the beam and the shape of the pulse.
Show AbstractAbout secular variations of the nodes and apses in the system ξU. Ma. Ursae Majoris
About secular variations of the nodes and apses in the system ξU. Ma. Ursae Majoris
A.A. Оrlоv, N.A. Sоlоvауa
The work is devoted to the application of the stellar three-body problem to the system ξU.Ma. We determine the secular variations of longitudes of the nodes and periastrons of the components of the system, and made a comparison with the results of Brownrs theory.
Show AbstractOn the coastal circulation induced by surge and ebb of water
On the coastal circulation induced by surge and ebb of water
N.K. Shelkovnikov, S.A. Arsenyev
We study the effect of surge-ebb flows on the surface temperature of the ocean, thickness of the mixed layer, and on the temperature in the thermocline, in the region of the coastal shelf. The obtained solution of the problem is compared with observations. The model explains a mechanism for the formation of the cold deep waters.
Show AbstractOn the one method of solution of Lyppman-Shvinger's equation for nonhermit operator of interaction
On the one method of solution of Lyppman-Shvinger's equation for nonhermit operator of interaction
A.I. Vasкin, G.A. Ivanоv, A.M. Pоpоva
We present a method for the solution of the Lippmann-Schwinger equation for the quantum-mechanical two-body problem under the assumption that the interaction operator is complex. The essence of the method consists of reducing the equation to a system of two equations which can contain only a weak integrable singularity.
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