Long-wave spin excitations in the perfect s-d model are studied. The Hamiltonian of the model includes, apart from usually treated spin-electron processes, the Heisenberg exchange interaction of atomic spins and the ...

The models of adsorbo-catalitic centers for transition metals, which use the peculiarities of the electron-orbital structures as insulated and bounded atoms, have been analized. The important role of the unfilled ...

Non-Markovian generalization of the Fokker-Planck equation is proposed in attempt to describe the influence of memory effects on stochastic particle motion in both velocity and configuration spaces. General relations between ...

A short outline of revived methods of an action-at-a-distance description of interacting particles is given. A new approach to the problem of motion in relativistic gravity is discussed. The approach makes an essential ...

Representations from the supplementary series of unitary irreducible representations of the proper, ortochronous Lorentz group are labelled by the parameter z , 0 < z < 1 . There are qualitative differences between ...

Collective center-of-mass variables are introduced in the Lagrangian formalism of the relativistic classical mechanics of directly interacting particles. It is shown that the transition to the Hamiltonian formalism leads ...

The theory of the superconductivity mediated by kinematic and exchange interactions in t−J and two-band Hubbard models in a paramagnetic state is formulated. The Dyson equations for the matrix Green functions in terms of ...

Strange diffusion is defined as a process in which the mean square displacement of a randomly walking test particle behaves asymptotically as x²(t) ~ tα , with α ≠ 1 . A brief review of the properties of such processes ...

We examine the hypothesis that some supernova remnants (SNRs) may be responsible for some unidentified y-ray sources detected by EGRET instrument aboard the Compton Gamma Ray Observatory. If this is the case, y-rays are ...

A weakly relativistic statistical system of charged particles and an electromagnetic field is considered. The effective Hamiltonian of the system is obtained by the canonical Bogolubov transformation. The screening of ...