1 citations · 3 across the 4 of their papers we have counts for
9 papers
Quantum Phase Transitions in Spin-1/2 Ising Chain in Regularly Alternating Transverse Field: Spin Correlation Functions
Oleg Derzhko, Taras Krokhmalskii
We consider the spin-1/2 Ising chain in a regularly alternating transverse field to examine the effects of regular alternation on the quantum phase transition inherent in the quant…
Jordan-Wigner Approach to Dynamic Correlations in 2D Spin-1/2 Models
Oleg Derzhko, Taras Krokhmalskii
We discuss the dynamic properties of the square-lattice spin-1/2 XY model obtained using the two-dimensional Jordan-Wigner fermionization approach. We argue the relevancy of the fe…
Spatial decay of the one-body density matrix in insulators revised
Janusz Jedrzejewski, Taras Krokhmalskii
In the framework of the band theory, we consider two tight-binding models of insulators. The first one, proposed recently by Taraskin et al, is a translationally invariant system,…
Ground-state correlations of itinerant electrons in the spinless Falicov-Kimball chain and related tight-binding systems
J. Jedrzejewski, T. Krokhmalskii, O. Derzhko
We consider the one-dimensional spinless Falicov-Kimball model of itinerant fermionic particles (``spinless electrons''), which can hop between nearest-neighbour sites only, and of…
Incommensurate Spin-Peierls Phases in the One-Dimensional Quantum Isotropic XY Model
Oleg Derzhko, Taras Krokhmalskii
Using the numerical approach for a study of the thermodynamic properties of the nonuniform one-dimensional spin-1/2 isotropic XY model in a transverse field we examine different la…
Spin-1/2 transverse XX chain with a correlated disorder: dynamics of the transverse correlations
Oleg Derzhko, Taras Krokhmalskii
We examine numerically the dynamics of zz correlations in the spin-1/2 isotropic XY chain with random intersite coupling and on-site transverse field that depends linearly on the n…