On microscopic theory of spin-S Bose–Einstein condensate in a magnetic field

A.S. Peletminskii, S.V. Peletminskii and Yu.V. Slyusarenko

Physica A: Statistical Mechanics and its Applications, 2007, vol. 380, issue C, 202-210

Abstract: The ground state and low-lying collective modes of Bose–Einstein condensate (BEC) of atoms with arbitrary spin in a magnetic field is studied using Bogoliubov's model for weakly interacting Bose gas. The equation for vectorial order parameter valid at temperature T→0 is derived and its specific solution is found. This solution corresponds to the formation of BEC of atoms with a definite spin projection onto direction of magnetic field. We study the thermodynamic stability of the found ground state and obtain the expressions for low-lying collective modes.

Keywords: Bose–Einstein condensation; Spinor condensate; Weakly interacting Bose gas; Quasiaverages; Thermodynamics; Excitation spectra (search for similar items in EconPapers)
Date: 2007
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Persistent link: https://EconPapers.repec.org/RePEc:eee:phsmap:v:380:y:2007:i:c:p:202-210

DOI: 10.1016/j.physa.2007.02.107

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