31 citations · 289 across the 39 of their papers we have counts for
40 papers
Quantum dynamics of spinful impurity in ideal Bose gas
O. Hryhorchak, V. Pastukhov
We discuss the quench dynamics of an isolated system composed of a single spinful impurity in the transverse Rabi field and bath of non-interacting three- and two-dimensional boson…
Two- and three-body bound states in one-dimensional Fermi bipolaron with three-body interaction
O. Hryhorchak, V. Pastukhov
We discuss the ground-state properties of two bosonic (or spin-1/2 fermionic in a singlet spin state) impurities immersed in a one-dimensional ideal Fermi gas with only the three-b…
One-dimensional tunneling of the two-body bound state
N. Shypka, O. Hryhorchak, V. Pastukhov
We consider bound and scattering states of the one-dimensional dimer formed by two coupled non-identical atoms when one of them also interacts with the zero-range potential located…
Four-body physics in low-dimensional bosons with three-body interaction
V. Polkanov, O. Hryhorchak, V. Pastukhov
The two-channel model for bosons with the three-body interaction is proposed. Similar to the Hamiltonian describing narrow Feshbach resonance in the two-body sector, our model incl…
Evolution of a single spin in ideal Bose gas at finite temperatures
O. Hryhorchak, G. Panochko, V. Pastukhov
We study the finite-temperature dynamics of non-interacting bosons with a single static spinful impurity immersed. A non-zero contact boson-impurity pairwise interaction is assumed…
Strongly interacting Bose-Fermi mixtures in dimensions
V. Pastukhov
Thermodynamically stable low-temperature phases of the Bose-Fermi mixtures composed of bosons and spinless fermions close to four dimensions are considered. In the regime, where th…
Bipolaron in one-dimensional fermions with three-body interaction
O. Hryhorchak, G. Panochko, V. Pastukhov
The properties of the one-dimensional population-imbalanced fermions are discussed. The system is assumed to be in the two-body resonance where all two-body scattering leng…
Universal -wave tetramers in low-dimensional fermionic systems with three-body interaction
V. Polkanov, V. Pastukhov
Inspired by the narrow Feshbach resonance in systems with the two-body interaction, we propose the two-channel model of three-component fermions with the three-body interaction tha…
Competition of superfluid phases in low-dimensional spin- fermions with - and -wave interactions
A. Nikolaeva, O. Hryhorchak, V. Pastukhov
The ground state of spin- fermions with contact -wave inter- and -wave intra-species interactions is discussed. Particularly, we formulate the mean field scheme for…
Trapped ideal Bose gas with a few heavy impurities
O. Hryhorchak, V. Pastukhov
We formulate a general scheme for calculation of thermodynamic properties of ideal Bose gas with microscopic number of static impurities immersed, when the system is loaded in the…
Second root of dilute Bose-Fermi mixtures
O. Hryhorchak, V. Pastukhov
We discuss an equilibrium mean-field properties of mixtures consisting of bosons and spin-polarized fermionic atoms with a point-like interaction in an arbitrary dimension .…
Polaron in almost ideal molecular Bose-Einstein condensate
O. Hryhorchak, V. Pastukhov
We discuss properties of a single impurity atom immersed in the spin- dilute Fermi gas with equal populations of two species in the deep Bose-Einstein condensate (BEC) phase.…
Static impurities in a weakly-interacting Bose gas
G. Panochko, V. Pastukhov
We present a comprehensive discussion of the ground-state properties of dilute -dimensional Bose gas interacting with a few static impurities. Assuming the short-ranged characte…
Efimov-like physics in fraction-dimensional Bose systems with three-body interaction
O. Hryhorchak, V. Pastukhov
A few-body properties of spinless Bose particles interacting via the contact three-body potential in geometries with fractional dimensions are considered. In the four-body…
Finite periodic comb
O. I. Hryhorchak, V. S. Pastukhov
A finit periodic comb was solved by the help of both classical approach based on a direct solving of a Sr\"{odinger} equation and a quantum wave impedance method. It was dem…
Impurity in a three-dimensional unitary Bose gas
O. Hryhorchak, G. Panochko, V. Pastukhov
By using simple and efficient method we discuss properties of a single impurity immersed in three-dimensional Bose gas with the interaction between particles tuned to unitary limit…
Ground-state properties of dilute spinless fermions in fractional dimensions
V. Pastukhov
We analyze zero-temperature universal properties of the simplest Galilean-invariant model of spinless low-dimensional fermions with short-range two-body interactions. In particular…
Mean-field study of repulsive 2D and 3D Bose polarons
O. Hryhorchak, G. Panochko, V. Pastukhov
The detailed mean-field treatment of the Bose polaron problem in two and three dimensions is presented. Particularly, assuming that impurity is immersed in the dilute Bose gas and…
Two- and three-body effective potentials between impurities in ideal BEC
G. Panochko, V. Pastukhov
We exactly calculate the full temperature dependence of Casimir-like forces appearing between two and three static impurities loaded in the ideal Bose gas below the Bose-Einstein c…
Large- expansion for condensation and stability of Bose-Bose mixtures at finite temperatures
Orest Hryhorchak, Volodymyr Pastukhov
The two-component mixture of Bose particles with short-range pairwise interaction at finite temperatures in three dimensions is considered. Particularly we examine, by means of the…
Mean-field construction for spectrum of one-dimensional Bose polaron
Galyna Panochko, Volodymyr Pastukhov
The full momentum dependence of spectrum of a point-like impurity immersed in a dilute one-dimensional Bose gas is calculated on the mean-field level. In particular we elaborate, t…
Anomalous frequency shifts in a one-dimensional trapped Bose gas
Manuel Valiente, Volodymyr Pastukhov
We consider a system of interacting bosons in one dimension at a two-body resonance. This system, which is weakly interacting, is known to give rise to effective three-particle int…
Condensation and superfluidity of Bose gas
Orest Hryhorchak, Volodymyr Pastukhov
We perform the comprehensive comparison of properties of the condensate and superfluid densities for the -component three-dimensional Bose gas with the symmetric inter- and intr…
Mean-field properties of impurity in Bose gas with three-body forces
Volodymyr Pastukhov
We exactly analyze, on the mean-field level, the low-momentum properties of a single impurity atom loaded in the dilute one-dimensional Bose gas with two- and three-body short-rang…