Vol 17, No 2 (2014)
- Year: 2014
- Articles: 9
- URL: https://journals.ssau.ru/pwp/issue/view/389
Articles
The influence of atomic coherence on entanglement of atoms with two-photon transitions taking into account the dynamical Stark shift
Abstract
In this paper we investigated the entanglement dynamics of two atoms interacting with mode of quantum electromagnetic field via degenerate two-photon transitions taking into account the Stark shift. We considered the initial coherent disentangled atomic states and field Fock states. We shown the possibility of the control of degree of atomic entanglement due to the Stark shift and the atomic coherence.
7-12
The combined method of finding solutions to the dispersion equation for waveguide electrodynamic structures on the complex plane of one of the wave numbers
Abstract
The problem of solving the dispersion equation for waves guideway electrodynamic structures on the complex plane of one of the wave numbers is considered. Combined method based on the combination of positive properties Muller method and the method of phase variation, based on the principle of the argument is proposed. The procedure of the application of the method is described.
13-17
Method of calculation of a smooth transition between two round waveguides based on the integral ratio of Lorentz
Abstract
In this work demonstrated a general approach to the calculation of the transmission characteristics of a smooth transition between the two waveguides of round cross-section. Method of calculation is based on the integral ratio of Lorentz. The purpose of the testing is a method for solving problems of the diffraction of electromagnetic waves on irregular sections of waveguide structures. Developed an algorithm the calculation of transmission characteristics of a smooth transition, connecting the guide structure of round cross-section. Shows the results the calculation of transmission characteristics of the track structure.
18-31
Modeling of nonreciprocal microwave devices based on magnetic nanocomposites
Abstract
The rigorous mathematical models of magnetic nanocomposite-based nonreciprocal microwave devices are developed to solve the 3D diffraction boundary problems for the Maxwell`s equations with electrodynamic boundary conditions гsing the effective electromagnetic parameters of magnetic nanocomposites. The complex components of the effective permeability tensor of magnetic opal nanocomposite depending on the DC magnetic field were calculated using the electrodynamic model by the decomposition on autonomous blocks with magnetic nanoinclusions and virtual Floquet channels. Sing the numerical algorithm based on the projection method the results of electrodynamic calculation of scattering parameters of magnetic opal nanocomposite-based Y-circulator depending on the frequency were obtained.
32-39
The mapping of Duffing oscillator in discrete time
Abstract
The option of discrete mapping of Duffing oscillator - oscillatory system with cubic nonlinearity is offered. Mapping is received on the basis of a combination of methods of parametrical synthesis and invariancy of pulse characteristics of dynamic systems. Resonant characteristics of a discrete Duffing oscillator - the DT-system determined by offered display are investigated.
40-43
A device for control the coating thickness on the surface of the space vehicle
Abstract
This article presents mathematical and physical models of a device based on the technique of a piezoelectric quartz crystal microbalance which find the low change of films. The ablation under the fluence of atomic oxygen and ultraviolet of Kapton deposited on the quartz plate was simulated.
44-48
Solid bodies accelerators
Abstract
Various types of accelerators particulate analysis examined the suitability of designs to simulate collisions of cosmic rays, as well as elements of the space debris from the surface of the spacecraft. The evolution of accelerators and basic directions for their further development.
49-58
Permutation operation and its application to the study of wireless devices and systems
Abstract
The article describes the method of permutations that can greatly simplify the analysis of the processes occurring in different circuits, blocks and elements that make up the wireless devices and systems. The article describes the conditions and limitations of permutations, and describes an example of using this method for the study of digital amplitude detector.
59-63
Dual-channel wireless electroencephalograph
Abstract
Authors developed dual-channel wireless electroencephalograph. State of the brain is estimated using chaotic time series. It is shown that in such a treatment is only two channels. Sending acquired data using the wireless unit is operating in the standard RS-232.
64-75
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