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81.
P. Jakubczyk Y. Kravets D. Jakubczyk 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2011,61(2):507-512
We investigate the entanglement properties of symmetry states of the Schur-Weyl duality. Our approach based on reduced two-qubit
density matrices, and concurrence as the measure of entanglement. We show that all kinds of “entangled graphs", which describe
the entanglement structure in Schur-Weyl states are completely coded in the corresponding Young tableau. 相似文献
82.
The influence of the short-range order of amorphous nickel-phosphorus alloy on the IR absorption is studied. The relation
between the optical properties and the microstructure of amorphous nickel-phosphorus alloys obtained by various technological
methods is considered. It is shown that a coating of amorphous Ni−P alloy obtained by electrolytic deposition has the most
homogeneous structure; this permits the use of such coatings as protective layers for optical and magnetic memory disks. Optical
methods permitting the estimation of the dimensions of the microcrystalline regions in an amorphous matrix are outlined.
T. Shevchenko Kiev University. Translated from Izvestiya Vysshikh Uchebnykh Zavedenii, Fizika, No. 5, pp. 34–40. May, 1997. 相似文献
83.
84.
V. V. Kravets N. V. Trifonova A. I. Shvets 《Journal of Applied Mechanics and Technical Physics》1975,16(4):561-563
In view of the problems involved in the design of hypersonic aircraft great interest has arisen in recent years as to the behavior of wings in fast supersonic flows. Two main approaches have been used: a study of hypersonic flow around traditional wings, and a search for new configurations with optimum aerodynamic properties. Aerodynamic [1, 2], heat-transfer [3], and stability investigations (for V-shaped wings in super- and hypersonic flows) belong to the latter category. Before attaining supersonic flight the aircraft has to overcome the range of subsonic velocities. In this connection it is important to study flow around V-shaped wings at M < 1. Little research has been devoted to flow around such configurations at subsonic velocities, principal attention having been directed at the study of rapid flow around aircraft configurations with V-shaped wings or tails. The results of analytical and numerical calculations allowing for the interference of transient aerodynamic forces acting on a V-shaped and mutiple-fin tail group in combination with the fuselage were presented in [4, 5]. An experimental study of V-shaped wings as regards the influence of the wing dihedral angle on the aerodynamic characteristics of a model aircraft was presented in [6, 7].Translated from Zhurnal Prikladnoi Mekhaniki i Technicheskoi Fiziki, No. 4, pp. 102–106, July–August, 1975. 相似文献
85.
Nina Kravets Armando Piccardi Alessandro Alberucci Oleksandr Buchnev Gaetano Assanto 《Molecular Crystals and Liquid Crystals》2015,619(1):28-34
We demonstrate that light refraction at a straight interface between an isotropic dielectric and a nematic liquid crystal can change from positive to negative depending on power. The phenomenon relies on the reorientational response and the all-optical rotation of the optic axis, causing in turn variations in walk-off and beam self-steering. 相似文献
86.
The results of investigations into the use of low-temperature plasma for modification of porous polymer membranes are summarized. The basic lines of research in this area are considered. It is shown that plasma treatment is a quite effective tool for both improving the properties of existing polymer membranes and manufacturing new composite membranes with unique characteristics. 相似文献
87.
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89.
Cedrik Meier Stephan Lüttjohann Vasyl G. Kravets Hermann Nienhaus Axel Lorke Hartmut Wiggers 《Physica E: Low-dimensional Systems and Nanostructures》2006,32(1-2):155
The Raman spectra of silicon nanoparticles in the size range between d=3.5– have been studied experimentally. Scattering processes up to second order are being observed. The experimental results are analyzed in the framework of the phonon confinement model. While this model describes qualitatively the observations for first-order scattering processes, it is not applicable for scattering processes of higher order. From the analysis of second-order scattering, we determine a redshift of the TO phonon at the X and L points. 相似文献
90.
The light reflection spectra and the magnetorefractive effect in the cobalt-based amorphous ribbons in the IR spectral region (λ = 2.5–25 μm) are studied. These amorphous alloys are characterized by the magnetoimpedance effect, which is enhanced after thermal and laser annealing. It is found that the magnetoimpedance and magnetorefractive effects correlate with each other. The magnetorefractive effect reveals a feature at λ = 15–20 μm and the change of sign in the wavelength region 20–25 μm. It is shown that, in the first approximation, the optical properties of the amorphous alloys in the IR spectral region can be explained on the basis of a modified Hagen-Rubens relation. It is found that the change in the reflection coefficient of amorphous metal films in the IR spectral region under action of a magnetic field is caused by the change in both their magnetic permeability and conductivity, which is caused by the degree of polarization of localized electronic states at the Fermi level. 相似文献