Interrelationship of classical and quantum fluctuations is discussed. With
energy dissipation being taken into account, fluctuations are shown to be
irreversible even in the case of classical systems. An analogy to Kubo ...
We consider the dual BBGKY hierarchy for quasiobservables of many-
particle systems as a basis of nonequilibrium statistical mechanics and
give a complete description of the evolution of quasiobservables.
A variant of a Gaussian approximation in Ising model of phase transition
is suggested. The method of functional integration with the application of
a variational method is put in the basis of the approach. The Hamiltonian
(the ...
The optical absorption spectrum in an analytically solvable model of a
localized-electron and phonons is investigated using the operator algebra in NonEquilibrium Thermo Field Dynamics (NETFD). The position and
the ...
We apply the Liouville-von Neumann (LvN) approach to open systems to describe the nonequilibrium quantum evolution. The Liouville-von Neumann approach is a unified method that can be applied to both time-independent (closed) ...
Using Terwiel’s cumulants the Markovian approximation to arrive to the Quantum Master Equation, for a system interacting with a thermal bath, is revisited. The second order weak coupling approximation is analyzed, then a ...
Within the band model we study the electron redistribution around the dislocation wall depending on the conduction band filling ( 0 < n < 1 ) taking into account the electron-deformation coupling. We show that as the
conduction ...
A short review of theoretical results on the Langmuir-Hinschelwood and
Eley-Rideal reaction schemes is presented. It is shown that the rates of elementary processes at the surface are coupled through the bulk properties
of ...
An approximate analytical scheme of the dynamical mean-field theory
(DMFT), that is used for electron systems with Hubbard correlations and is
exact in the limit of the infinite dimensionality of a space, is developed. ...
The spectrum of the modelled regular superlattice which includes contacts
is investigated using the transfer-matrix formalism. It is shown that the separated pair resonances in the chain spectrum (which are distributed ...
Various type contributions to Raman light scattering are investigated for the
Hubbard, t − J and pseudospin-electron models. To construct the polarizability operator the microscopic approach is used, which is based on ...
Kibble and Zurek have provided a unifying causal picture for the appearance of topological defects like cosmic strings or vortices at the onset of
phase transitions in relativistic QFT and condensed matter systems ...
Quasiparticle descriptions of nonequilibrium physics hold the promise of
tracking the relevant degrees of freedom in calculations of statistical systems, as well as providing an important formal perspective on quantum
field ...
A simple description of thermodynamics of DMAAS and DMAGaS ferroelectric crystals by means of Landau expansion is proposed. Conditions
of occurrence of phase transitions are established and their temperatures
are obtained. ...
Classical relativistic system of point particles coupled with an electromagnetic field is considered in the three-dimensional representation. The gauge
freedom connected with the chronometrical invariance of the four-dimensional ...
In a hot system every excitation acquires a finite lifetime, manifesting itself
in a non-zero spectral width. Ordinary damping as well as quantum memory effects arise from this nontrivial spectral function. This report ...
Review: J.Barthel, H.Krienke, W.Kunz. Physical Chemistry of Electrolyte Solutions: Modern Aspects. Steinkopff, Darmstadt and Springer, New York, 1998, 401 p.)
The present and the preceding issues of “Condensed Matter Physics” contain
papers written in honour of Professor Ihor Yukhnovskii on the occasion of his 75th
birthday. Professor Ihor Yukhnovskii is a well-known Ukrainian ...
On September 1, 2000 Academician, Professor Ihor Yukhnovskii, a prominent
Ukrainian scientist and a founder of the Lviv school of statistical physics, will celebrate
his 75th birthday.