arXiv subjects
Publications and source records attributed to O. Derzhko.
Using continued fractions we obtained the exact result for the density of magnon states of the regularly alternating spin-1/2 XX chain with Dzyaloshinskii-Moriya interaction. We examined the stability of the magnetic chain with respect to the spin-Peierls dimerization.
Using numerical approach developed recently we obtained the transverse dynamic structure factor for the spin-1/2 transverse XX chain with correlated Lorentzian disorder.
The paper presents exact calculations of thermodynamic quantities for the spin-1/2 isotropic XY chain with random lorentzian intersite interaction and transverse field that depends linearly on the surrounding intersite interactions.
The paper presents a new numerical approach for studying the thermodynamical and dynamical properties of finite spin-$\frac{1}{2}$ $XY$ chains. Special attention is given to examining the influence of disorder on the average transverse dynamical susceptibility of Ising chain in random transverse field.
A gas of atoms some of which are in excited electronic state is under consideration. Since the lifetime of an excited state is to great extent larger than the time required for establishing the equilibrium over translational degrees of freedom the system possesses equilibrium properties. They are determined essentially by many-particle resonance interactions that appear in the system of identical differently excited atoms. The present paper contains the results of numerical calculations dealing with the examination of virial state equation and density expansion for canonical pair spatial distribution function of the system in question with the accuracy up to three-particle contributions. The obtained results permit to study the excited atoms influence on gas-liquid phase transition and the excimer molecules formation in the gas with excited atoms.
A numerical approach to the study of equilibrium statistical properties of spin-1/2 XY chains is suggested. The approach is illustrated by the examining of influence of disorder on transverse dynamical susceptibility of spin-1/2 Ising chain in random transverse field.
For 1D s=1/2 anisotropic XY model in transverse field with Dzyaloshinskii-Moriya interaction using Jordan-Wigner transformation the thermodynamical functions, static spin correlation functions, transverse dynamical spin correlation function and connected with it transverse dynamical susceptibility have been obtained. It has been shown that Dzyaloshinskii-Moriya interaction essentially influences the calculated quantities.