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Journal of Low Temperature Physics

, Volume 152, Issue 1–2, pp 21–46 | Cite as

Spin Dynamics of a Trapped Spin-1 Bose Gas above the Bose-Einstein Transition Temperature

  • Yuki Endo
  • Tetsuro NikuniEmail author
Article

Abstract

We study collective spin oscillations in a trapped spin-1 Bose gas above the Bose-Einstein transition temperature. Starting from the Heisenberg equation of motion, we derive a kinetic equation describing the dynamics of a thermal gas with the spin-1 internal degree of freedom. Applying the moment method to the kinetic equation, we study spin-wave collective modes with dipole symmetry. The dipole modes in the spin-1 system are classified into the three types of modes. These frequencies and damping rates are obtained as functions of the peak density. Moreover we find that the damping rate is characterized by three relaxation times associated with collisions.

Keywords

Bose-Einstein condensate Spinor condensate Finite-temperature 

PACS

03.75.Kk 03.75.Mn 

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Copyright information

© U.S. Government 2008

Authors and Affiliations

  1. 1.Department of Physics, Faculty of ScienceTokyo University of ScienceTokyoJapan

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