Zobrazeno 1 - 10
of 91
pro vyhledávání: '"Slyusarenko, Yu. V."'
We develop a general kinetic approach to studying high-frequency collective excitations in arbitrary-spin quantum gases. To this end, we formulate a many-body Hamiltonian that includes the multipolar exchange interaction as well as the coupling of a
Externí odkaz:
http://arxiv.org/abs/2409.16995
Publikováno v:
J. Phys. A: Math. Theor. 56 435001 (2023)
In the context of quantum gases, we obtain a many-body Hamiltonian for spin-3/2 atoms with general multipole (spin, quadrupole, and octupole) exchange interaction by employing the apparatus of irreducible spherical tensor operators. This Hamiltonian
Externí odkaz:
http://arxiv.org/abs/2305.14043
Publikováno v:
Physical Review B 105, 184307 (2022)
We study theoretically transitions between the localized and chaotic many-body regimes in one-dimensional quantum lattice systems with long-range couplings between particles and linear external potential. In terms of established criteria characterizi
Externí odkaz:
http://arxiv.org/abs/2201.13090
Publikováno v:
J. Phys. A: Math. Theor. 55 405003 (2022)
We theoretically study a weakly interacting gas of spin-1 atoms with Bose-Einstein condensate in external magnetic field within the Bogoliubov approach. To this end, in contrast to previous studies, we employ the general Hamiltonian, which includes b
Externí odkaz:
http://arxiv.org/abs/2112.03128
Publikováno v:
J. Phys. A: Math. Theor. 54 165001 (2021)
We obtain and justify a many-body Hamiltonian of pairwise interacting spin-1 atoms, which includes eight generators of the SU(3) group associated with spin and quadrupole degrees of freedom. It is shown that this Hamiltonian is valid for non-local in
Externí odkaz:
http://arxiv.org/abs/2012.01078
Publikováno v:
Physics Letters A 417 (2021) 127695
We study theoretically a gas consisting of charged bosons (ions) over the flat dielectric surface at low temperatures and its tendency to form a state with a Bose-Einstein condensate. For the stability of a system, an additional external electric fie
Externí odkaz:
http://arxiv.org/abs/2011.10032
Publikováno v:
Phys. Scr. 96 (2021) 045401
We study thermodynamic properties of weakly interacting Bose gases above the transition temperature of Bose-Einstein condensation in the framework of a thermodynamic perturbation theory. Cases of local and non-local interactions between particles are
Externí odkaz:
http://arxiv.org/abs/2011.05628
Publikováno v:
Physics Letters A, v. 384, issue 31, 126798 (2020)
We study a many-body system of interacting spin-1 particles in the context of homogeneous gases of ultracold atoms. In general, its description requires eight parameters among which there are three components of magnetization and five parameters asso
Externí odkaz:
http://arxiv.org/abs/1911.11391
Publikováno v:
Condens. Matter Phys., 2018, vol. 21, No. 3, 33601
A theory of equilibrium states of electrons above a liquid helium surface in the presence of an external clamping field is built based on the first principles of quantum statistics for the system of many identical Fermi-particles. The approach is bas
Externí odkaz:
http://arxiv.org/abs/1809.09921
We develop a microscopic approach to the kinetic theory of many-particle systems with dissipative and potential interactions in presence of active fluctuations. The approach is based on a generalization of Bogolyubov--Peletminsky reduced description
Externí odkaz:
http://arxiv.org/abs/1612.03426