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Перегляд за темою "Section E. Phase Transitions and Diffusion Processes in Condensed Matter and Gases"

Репозиторій DSpace/Manakin

Перегляд за темою "Section E. Phase Transitions and Diffusion Processes in Condensed Matter and Gases"

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  • 2D Ising-Heisenberg model with quartic interaction 
    Valverde, J.S. (Вопросы атомной науки и техники, 2012)
    We propose a two-dimensional spin-1/2 Ising-Heisenberg model with quartic interaction. In this sense the phase diagram for the model at zero temperature is studied, obtaining four different configurations for the unitary ...
  • About the influence of asymmetry of nuclear matter on the unitarity of singlet-triplet superfluid states 
    Shulga, S.N. (Вопросы атомной науки и техники, 2012)
    Unitarity of superfluid states in nuclear matter is studied in the case that the quasi-particle energy matrix holds scalar and vector components in isospin space at the same time, ξ = ξ0 + ξτ. The vector component of ξ can ...
  • Advanced Bogolyubov model of imperfect bose gas and superfluidity 
    Bogolyubov, N.N. Jr.; Sankovich, D.P. (Вопросы атомной науки и техники, 2012)
    The equilibrium properties of a system of interacting bosons are studied from a microscopic point of view. We calculate the superfluid density in the Bogolyubov model of imperfect Bose gas. The model superstable Hamiltonian ...
  • Cluster expansion in cite percolation problem on cubic lattice 
    Antonova, E.S.; Virchenko, Yu.P. (Вопросы атомной науки и техники, 2012)
    The cluster expansion of the Bernoulli random field percolation probability of the cubic lattice has been built. On its basis, it has been obtained the upper guaranteed estimate of the percolation threshold and corresponding ...
  • Critical phenomena and critical dimensions in anisotropic nonlinear systems 
    Babich, A.V.; Berezovsky, S.V.; Kitcenko, L.N.; Klepikov, V.F. (Вопросы атомной науки и техники, 2012)
    The model that allows one to generalize the notions of the multicritical and Lifshitz points is considered. The model under consideration includes the higher powers and derivatives of order parameters. Critical phenomena ...
  • Gibbs equilibrium averages and Bogolyubov measure 
    Sankovich, D.P. (Вопросы атомной науки и техники, 2012)
    Application of the functional integration methods in equilibrium statistical mechanics of quantum Bose-systems is considered. We show that Gibbs equilibrium averages of Bose-operators can be represented as path integrals ...
  • Homogeneous bubble nucleation limit of lead 
    Abyzov, A.S.; Schmelzer, J.W.P.; Davydov, L.N.; Slezov, V.V. (Вопросы атомной науки и техники, 2012)
    Liquid heavy metal coolant in a fast reactor, as well as in accelerator driven systems, is exhibited to large thermal and pressure shocks which can cause cavitation in the coolant. Here we calculated the work of the critical ...
  • Hydrodynamic theory of plasma oscillations in the presence of electron density correlations 
    Stupka, A.A. (Вопросы атомной науки и техники, 2012)
    Hydrodynamics of electronic plasma at presence of correlation of charge density is considered. Equations of ideal hydrodynamics with such condition for the case of immobile ions are received. It is shown that a new variable ...
  • Nonlocal effect influence on the vortex filament structure in Bose-gas 
    Ivashin, A.P.; Poluektov, Yu.M. (Вопросы атомной науки и техники, 2012)
    Using the Gross-Pitaevskii equation (GPE), which accounts for a weak non-locality effects, we study the structure of the vortex filaments in a Bose-gas. We show that the sign of the additional terms in the generalized GPE ...
  • Nonperturbative approach to superfluid bose systems 
    Peletminskii, A.S.; Peletminskii, S.V.; Poluektov, Yu.M. (Вопросы атомной науки и техники, 2012)
    We study a superfluid Bose system with single-particle and pair condensates using a nonperturbative approach. The self-consistency equations for two order parameters are obtained from the principle of maximum entropy. They ...
  • One-dimensional hopping transport in energetically disordered systems in presence of a strong biased field 
    Fateev, M.P. (Вопросы атомной науки и техники, 2012)
    This report is devoted to the study of hopping drift mobility of charge carries in one-dimensional regular chain of localization site with energetic disorder. The individual jump rate was assumed to follow Miller-Abrahams ...
  • On electric polarization of helium atoms by acceleration 
    Poluektov, Yu.M.; Savchenko, V.N. (Вопросы атомной науки и техники, 2012)
    Possibility of explanation of high electric activity in superfluid helium [1–3] by polarization of helium atoms caused by acceleration is researched. It is shown that this effect is insufficient to explain the phenomenon.
  • On phase transitions in the system of charged fermi particles above the liquid dielectric surface 
    Slyusarenko, Yu.V.; Lytvynenko, D.M.; Kirdin, A.I. (Вопросы атомной науки и техники, 2012)
    A consistent theory of equilibrium states of charges and fields above the surface of liquid dielectric film located on a solid substrate is built. The developed approach is used for the description of phase transitions in ...
  • Phonons, rotons and ripplons at interfaces 
    Tanatarov, I.V.; Adamenko, I.N.; Nemchenko, K.E.; Wyatt, A.F.G. (Вопросы атомной науки и техники, 2012)
    We use dispersive hydrodynamics to describe thermal excitations of superfluid helium 4. Dispersion relation of the bulk quasiparticles, phonons and rotons, acts as an input parameter of the theory. Wiener and Hopf method ...
  • Symmetry, phase states and dynamics of magnets with spin s=1 
    Kovalevsky, M.Y.; Kotelnikova, O.A. (Вопросы атомной науки и техники, 2012)
    The results of investigations of magnets with spin s=1 are presented. The analysis of the possible symmetry of exchange interactions and its relationship with the magnetic degrees of freedom was done. We formulate the ...
  • The absorption of the variable electric field in superfluid helium by the Аkhiezer mechanism 
    Naumovets, A.S.; Khodusov, V.D. (Вопросы атомной науки и техники, 2012)
    Earlier a series of experiments showed that the energy of a roton in superfluid helium is linearly dependent on electric field. A variable adiabatically changing external electric field leads to a modulation of the roton ...
  • The field dependence of the hopping transport in bond-disordered systems 
    Fateev, M.P. (Вопросы атомной науки и техники, 2012)
    In this report we derive a new version of effective-medium theory for uniform biased diffusion which takes into account both field-created traps and bond disorder. The two random quantities are assumed to be independent. ...
  • The limit solubility relationships based on Frenkel’s heterophase fluctuations theory 
    Shapovalov, R.V.; Osmayev, O.A. (Вопросы атомной науки и техники, 2012)
    For a weak one-component solution, in which the solvent and dissolved substances are not chemically bound, a simple analytical approximation was found for temperature dependence of limiting solubility of the dissolve ...
  • Theory of heterogeneous / homogeneous catalytic reaction with presaturation 
    Coeur-Tourneur, C.; Kopiychenko, D.Yu.; Mchedlov-Petrossyan, P.O. (Вопросы атомной науки и техники, 2012)
    In this communication we present a theoretical study of chemical reactions in a system of solid particles, immersed in a fluid environment. Our primary concern here is investigation of the systems of catalytic particles ...
  • Transmission of wave packets through open mesoscopic systems 
    Ivanov, N.; Skalozub, V. (Вопросы атомной науки и техники, 2012)
    Tunneling of the wave packets having rectangular and Gaussian forms through a quantum diode is investigated. By using the potential of the system the S-matrix for this structure is obtained and the analytic expressions ...