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

Author

Listed:
  • Peletminskii, A.S.
  • Peletminskii, S.V.
  • Slyusarenko, Yu.V.

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.

Suggested Citation

  • Peletminskii, A.S. & Peletminskii, S.V. & Slyusarenko, Yu.V., 2007. "On microscopic theory of spin-S Bose–Einstein condensate in a magnetic field," Physica A: Statistical Mechanics and its Applications, Elsevier, vol. 380(C), pages 202-210.
    • Handle: RePEc:eee:phsmap:v:380:y:2007:i:c:p:202-210
    DOI: 10.1016/j.physa.2007.02.107
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