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Pis'ma v Zhurnal Èksperimental'noi i Teoreticheskoi Fiziki, 2020, Volume 112, Issue 9, Pages 618–622
DOI: https://doi.org/10.31857/S1234567820210077 (Mi jetpl6292) 		 
This article is cited in 1 scientific paper (total in 1 paper)

CONDENSED MATTER

Low-density spinor Bose gas of particles with arbitrary spin

V. S. Babichenkoa, I. Ya. Polishchukab

a Moscow Institute of Physics and Technology (National Research University), Dolgoprudnyi, Moscow region, 141700 Russia
b National Research Center Kurchatov Institute, Moscow, 123182 Russia
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DOI: https://doi.org/10.31857/S1234567820210077
Abstract: The properties of the ground state and the spectrum of elementary excitations of an ultracold rarefied three-dimensional Bose gas of particles with arbitrary nonzero spin are investigated. It is assumed that the bare interaction consists of two parts: a short-range isotropic interaction that is independent of spin orientation and a long-range anisotropic spin-spin interaction of dipole-dipole type. The Gross-Pitaevskii equation is obtained. It is shown using this equation that the renormalized interaction, determined by the contribution of high momenta, plays an important role in the formation of the spin structure of the ground state and the density dependence of the chemical potential. It is established that there exists a range of parameters of the bare-interaction pair potential where the ground state is ferromagnetic. Criteria for the stability of this state are found. An equation describing the dynamics of the spin density is obtained. The spectrum of elementary excitations is determined.
Funding agency Grant number
Russian Foundation for Basic Research 19-02-00433 А
The work of I.Ya.P. on the problem considered here began at the Max Planck Institute for the Physics of Complex Systems (Dresden, Germany), where he worked at the invitation of Prof. P. Fulde and was then supported by the Russian Foundation for Basic Research, project no. 19-02-00433-a.
Received: 24.08.2020
Revised: 29.09.2020
Accepted: 30.09.2020
English version:
Journal of Experimental and Theoretical Physics Letters, 2020, Volume 112, Issue 9, Pages 577–581
DOI: https://doi.org/10.1134/S0021364020210067
Bibliographic databases:
Document Type: Article
Language: Russian
Citation: V. S. Babichenko, I. Ya. Polishchuk, “Low-density spinor Bose gas of particles with arbitrary spin”, Pis'ma v Zh. Èksper. Teoret. Fiz., 112:9 (2020), 618–622; JETP Letters, 112:9 (2020), 577–581
Citation in format AMSBIB
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\jour Pis'ma v Zh. \`Eksper. Teoret. Fiz.
\yr 2020
\vol 112
\issue 9
\pages 618--622
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\crossref{https://doi.org/10.31857/S1234567820210077}
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\transl
\jour JETP Letters
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\vol 112
\issue 9
\pages 577--581
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    • This publication is cited in the following 1 articles:
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