920 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- National Academy of Sciences of UkraineUA354 papers
- Lviv UniversityUA86 papers
- Coventry UniversityGB63 papers
- Lviv Polytechnic National UniversityUA61 papers
- Johannes Kepler University of LinzAT57 papers
- Centre National de la Recherche ScientifiqueFR55 papers
- Otto-von-Guericke-Universität MagdeburgDE42 papers
- University of Pavol Jozef ŠafárikSK27 papers
- Université de LorraineFR26 papers
- Georgetown UniversityUS21 papers
- Max Planck Institute for the Physics of Complex SystemsDE20 papers
- Institute of Physical ChemistryPL16 papers
13 papers · 2 filters
Phase transitions in Bose-Fermi-Hubbard model in the heavy fermion limit: Hard-core boson approach
I. V. Stasyuk, V. O. Krasnov
Phase transitions are investigated in the Bose-Fermi-Hubbard model in the mean field and hard-core boson approximations for the case of infinitely small fermion transfer and repuls…
Phonon-like excitations in the two-state Bose-Hubbard model
I. V. Stasyuk, O. V. Velychko, O. Vorobyov
The spectrum of phonon-like collective excitations in the system of Bose-atoms in optical lattice (more generally, in the system of quantum particles described by the Bose-Hubbard…
Marginal dimensions of the Potts model with invisible states
M. Krasnytska, P. Sarkanych, B. Berche +2
We reconsider the mean-field Potts model with interacting and non-interacting (invisible) states. The model was recently introduced to explain discrepancies between theoret…
Spectral properties of four-time fermionic Green's functions
A. M. Shvaika
The spectral relations for the four-time fermionic Green's functions are derived in the most general case. The terms which correspond to the zero-frequency anomalies, known before…
Self-consistent approach to magnetic ordering and excited site occupation processes in a two-level system
M. A. Korynevskii, V. B. Solovyan
Ferromagnetic ordering in a two-level partially excited system is studied in detail. Magnitudes of magnetization (magnetic order parameter) and lattice ordering (excited level occu…
Partition function zeros for the Ising model on complete graphs and on annealed scale-free networks
M. Krasnytska, B. Berche, Yu. Holovatch +1
We analyze the partition function of the Ising model on graphs of two different types: complete graphs, wherein all nodes are mutually linked and annealed scale-free networks for w…
Representation of the grand partition function of the cell model: The state equation in the mean-field approximation
Mikhailo Kozlovskii, Oksana Dobush
The method to calculate the grand partition function of a particle system, in which constituents interact with each other via potential, that include repulsive and attractive compo…
Functional renormalization group approach to non-collinear magnets
B. Delamotte, M. Dudka, D. Mouhanna +1
A functional renormalization group approach to -dimensional, -component, non-collinear magnets is performed using various truncations of the effective action relevant to stud…
Chain of kinetic equations for the distribution functions of particles in simple liquid taking into account nonlinear hydrodynamic fluctuations
Petro Hlushak, Mykhailo Tokarchuk
Chain of kinetic equations for non-equilibrium single, double and s-particle distribution functions of particles is obtained taking into account nonlin- ear hydrodynamic fluctuatio…
Violation of Lee-Yang circle theorem for Ising phase transitions on complex networks
M. Krasnytska, B. Berche, Yu. Holovatch +1
The Ising model on annealed complex networks with degree distribution decaying algebraically as has a second-order phase transition at finite temperature if $λ> 3…
Monte-Carlo study of anisotropic scaling generated by disorder
Oleg Vasilyev, Bertrand Berche, Maxym Dudka +1
We analyze the critical properties of the three-dimensional Ising model with linear parallel extended defects. Such a form of disorder produces two distinct correlation lengths, a…
Gas-liquid critical point of the ultrasoft restricted primitive model from analytic theory
O. Patsahan
Gas-liquid criticality in the ultrasoft restricted primitive model (URPM) of polyelectrolytes is studied using the collective variables-based theory. For the model, an effective Ha…
Incommensurate Single-Angle Spiral Orderings of Classical Heisenberg Spins on Zigzag Ladder Lattices
Dublenych Yuriy
Exact and rigorous solutions of the ground-state problem for the classical Heisenberg model with nearest-neighbor interactions on two- and three-dimensional lattices composed of zi…