164 citations
- University of LjubljanaSI8 papers
- Yukhnovskii Institute for Condensed Matter Physics of the National Academy of Sciences of UkraineUA8 papers
- National Academy of Sciences of UkraineUA7 papers
- Johannes Kepler University of LinzAT5 papers
- Institute of Mathematics, Physics, and MechanicsSI4 papers
- Jagiellonian UniversityPL3 papers
- Jan Kochanowski UniversityPL3 papers
- Pidstryhach Institute for Applied Problems of Mechanics and MathematicsUA3 papers
- Centre National de la Recherche ScientifiqueFR2 papers
- European Synchrotron Radiation FacilityFR2 papers
- Institute of MathematicsPL2 papers
- Institute of PhysicsPL2 papers
6 papers · 1 filter
Exact solution of a spin-1/2 chain with three-site interactions in a random transverse field: Influence of randomness on quantum phase transition
Volodymyr Derzhko, Oleg Derzhko, Johannes Richter
We present exact results for the ground-state and thermodynamic properties of the spin-1/2 chain with three-site interactions in a random (Lorentzian) transverse field. We dis…
Application of a Quantum Ensemble Model to Linguistic Analysis
Andrij Rovenchak, Solomija Buk
A new set of parameters to describe the word frequency behavior of texts is proposed. The analogy between the word frequency distribution and the Bose-distribution is suggested and…
On the length of chains of proper subgroups covering a topological group
Taras Banakh, Dušan Repovš, Lyubomyr Zdomskyy
We prove that if an ultrafilter L is not coherent to a Q-point, then each analytic non-sigma-bounded topological group G admits an increasing chain <G_a : a < b(L)> of its proper s…
Properties and uncertainties of scalar field models of dark energy with barotropic equation of state
B. Novosyadlyj, O. Sergijenko, S. Apunevych +1
The dynamics of expansion and large scale structure formation in the multicomponent Universe with dark energy modeled by the minimally coupled scalar field with generalized linear…
Multiferroicity and hydrogen-bond ordering in (C2H5NH3)2CuCl4 featuring dominant ferromagnetic interactions
B. Kundys, A. Lappas, M. Viret +5
We demonstrate that ethylammonium copper chloride, (C2H5NH3)2CuCl4, a member of the hybrid perovskite family is an electrically polar and magnetic compound with dielectric anomaly…
Brandt extensions and primitive topological inverse semigroups
Tetyana Berezovski, Oleg Gutik, Kateryna Pavlyk
In the paper we study (countably) compact and (absolutely) -closed primitive topological inverse semigroups. We describe the structure of compact and countably compact primitive…