Zobrazeno 1 - 10
of 39
pro vyhledávání: '"Volodymyr Pastukhov"'
Autor:
Orest Hryhorchak, Volodymyr Pastukhov
Publikováno v:
Atoms, Vol 11, Iss 5, p 77 (2023)
In this article, we formulate a general scheme for the calculation of the thermodynamic properties of an ideal Bose gas with one or two immersed static impurities, when the bosonic particles are trapped in a harmonic potential with either a quasi-1D
Externí odkaz:
https://doaj.org/article/5177abdf1f8345e9acbc3ad600cbc3f4
Autor:
Galyna Panochko, Volodymyr Pastukhov
Publikováno v:
Atoms, Vol 10, Iss 1, p 19 (2022)
We present a comprehensive discussion of the ground-state properties of dilute D-dimensional Bose gas interacting with a few static impurities. Assuming the short-ranged character of the boson-impurity interaction, we calculated the energy of three-
Externí odkaz:
https://doaj.org/article/9c29f1808a744ed19eba4d822e317635
Autor:
Volodymyr Pastukhov, O. I. Hryhorchak
Publikováno v:
Journal of Low Temperature Physics. 202:219-230
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 large-$N$ expansion technique, the stability of mixed state below the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::185d26bc5062c5cc0d15392ac37e79eb
https://doi.org/10.1007/s10909-020-02542-y
https://doi.org/10.1007/s10909-020-02542-y
Autor:
Volodymyr Pastukhov
Publikováno v:
Physical Review A. 102
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, it is shown that after proper renormalization of the coupling consta
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::078ff0f51f8424c4009dfe1d1042482b
https://doi.org/10.1103/physreva.102.013307
https://doi.org/10.1103/physreva.102.013307
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. Particularly, adopting the mean-field-like approximation we present
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::bba30cd71fef2e51e86cc0f1af701add
http://arxiv.org/abs/2006.06188
http://arxiv.org/abs/2006.06188
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 interacts with bosons via the hard-sphere two-body potential, we calcu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b48267fb7e5151adc5dfd24157ab2f9d
http://arxiv.org/abs/2001.03220
http://arxiv.org/abs/2001.03220
Autor:
Volodymyr Pastukhov, G. Panochko
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, to the finite-momentum Bose polaron, the path-integral approach whose s
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::24c0c1c76cca9b8a8789841d842140b1
http://arxiv.org/abs/1903.05953
http://arxiv.org/abs/1903.05953
Autor:
Volodymyr Pastukhov, Manuel Valiente
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 interactions, whose dynamics is similar to that of a two-dimensional Bose
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::acdfb62cf35bfc45415d0ee9a1470b7a
http://arxiv.org/abs/1902.07025
http://arxiv.org/abs/1902.07025
Publikováno v:
Ukrainian Journal of Physics; Vol. 61 No. 1 (2016); 29
Український фізичний журнал; Том 61 № 1 (2016); 29
Український фізичний журнал; Том 61 № 1 (2016); 29
The formula for the temperature dependence of the effective mass of a 4He atom in the superfluid and normal phases is obtained. This expression for the effective mass allows one to eliminate infra-red divergences, being applicable at all temperatures
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5745eca96ab8c2a07319f0f3e6a9ccf
https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019125
https://ujp.bitp.kiev.ua/index.php/ujp/article/view/2019125
Autor:
Volodymyr Pastukhov, G. Panochko
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 condensation transition point. Assuming the short-ranged character of t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1230f45acf068ff24dc5bade1223d7f6