Dissipative hydrodynamic equation of a ferromagnetic Bose-Einstein condensate: Analogy to magnetization dynamics in conducting ferromagnets

Kazue Kudo, Yuki Kawaguchi

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)

Abstract

The hydrodynamic equation of a spinor Bose-Einstein condensate (BEC) gives a simple description of spin dynamics in the condensate. We introduce the hydrodynamic equation of a ferromagnetic BEC with dissipation originating from the energy dissipation of the condensate. The dissipative hydrodynamic equation has the same form as an extended Landau-Lifshitz-Gilbert (LLG) equation, which describes the magnetization dynamics of conducting ferromagnets in which localized magnetization interacts with spin-polarized currents. Employing the dissipative hydrodynamic equation, we demonstrate the magnetic domain pattern dynamics of a ferromagnetic BEC in the presence and absence of a current of particles, and discuss the effects of the current on domain pattern formation. We also discuss the characteristic lengths of domain patterns that have domain walls with and without finite magnetization.

Original languageEnglish
Article number043607
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume84
Issue number4
DOIs
Publication statusPublished - 2011 Oct 7
Externally publishedYes

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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