Перегляд за автором "Sankovich, D.P."

Сортувати за: Порядок: Результатів:

  • 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 ...
  • Asymptotic exactness of c-number substitution in Bogolyubov's theory of superfluidity 
    Bogolyubov (jr), N.N.; Sankovich, D.P. (Condensed Matter Physics, 2010)
    The Bogolyubov model of liquid helium is considered. The validity of substituting a c-number for the k=0 mode operator â0 is established rigorously. The domain of stability of the Bogolyubov's Hamiltonian is found. We ...
  • Bogolyubov’s Approximation for Bosons 
    Bogolyubov (jr.), N.N.; Sankovich, D.P. (2010)
    We analyze the approximating Hamiltonian method for Bose systems. Within the framework of this method, the pressure for the mean field model of an imperfect boson gas is calculated. The problem is considered by the systematic ...
  • 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 ...
  • Soluble model of Bose-atoms with two level internal structure: non-conventional Bose-Einstein condensation 
    Corgini, M.; Sankovich, D.P. (Condensed Matter Physics, 2010)
    For a Bose atom system whose energy operator is diagonal in the so-called number operators and its ground state has an internal two-level structure with negative energies, exact expressions for the limit free canonical ...