31 citations · 85 across the 9 of their papers we have counts for
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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…
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…
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…
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…
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…
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…
Impurity self-energy in the strongly-correlated Bose systems
Galyna Panochko, Volodymyr Pastukhov, Ivan Vakarchuk
We proposed the non-perturbative scheme for calculation of the impurity spectrum in the Bose system at zero temperature. The method is based on the path-integral formulation and de…
Theory of a many-boson system with deformed Heisenberg algebra
I. O. Vakarchuk, G. I. Panochko
We propose to consider nonlinear fluctuations in the theory of liquid He deforming the commutation relations between the generalized coordinates and momenta. Generalized coor…