Beliaev Damping of Transverse Quadrupole Oscillations in Single-Vortex Bose-Einstein Condensates

T. Mizushima, M. Ichioka, K. Machida, T. Isoshima, M. M. Salomaa

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We investigate the damping mechanism of two transverse quadrupole oscillations in the single-vortex state of Bose-Einstein condensates using the linear response theory. It is demonstrated theoretically that the Kelvin modes as a propagation wave along a vortex line can be excited via Beliaev damping processes for only the counter-rotating quadrupole mode. We calculate the spectral weight of the density-response function within the Bogoliubov-Popov theory in a cylindrical system taking into account both Beliaev and Landau processes. Furthermore, we extend these considerations to the full 3D cigar-shaped system, which enables us to discuss the effects of the longitudinal confinement on the damping processes. These results are compared with the recent experiment on 87Rb by Bretin et al. [Phys. Rev. Lett. 90, 100403 (2003)].

Original languageEnglish
Pages (from-to)295-301
Number of pages7
JournalLaser Physics
Volume14
Issue number2
Publication statusPublished - Feb 1 2004

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Instrumentation
  • Condensed Matter Physics
  • Industrial and Manufacturing Engineering

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    Mizushima, T., Ichioka, M., Machida, K., Isoshima, T., & Salomaa, M. M. (2004). Beliaev Damping of Transverse Quadrupole Oscillations in Single-Vortex Bose-Einstein Condensates. Laser Physics, 14(2), 295-301.