Excitation transport through a domain wall in a Bose-Einstein condensate

Shohei Watabe, Yusuke Kato, Yoji Ohashi

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

We investigate the tunneling properties of collective excitations through a domain wall in the ferromagnetic phase of a spin-1 spinor Bose-Einstein condensate. Within the mean-field theory at T=0, we show that the transverse spin wave undergoes perfect reflection in the low-energy limit. This reflection property differs considerably from that of a domain wall in a Heisenberg ferromagnet where spin-wave excitations exhibit perfect transmission at arbitrary energy. When the Bogoliubov mode is scattered from this domain wall soliton, the transmission and reflection coefficients exhibit pronounced nonmonotonicity. In particular, we find perfect reflection of the Bogoliubov mode at energies where bound states appear. This is in stark contrast to the perfect transmission of the Bogoliubov mode with arbitrary energy through a dark soliton in a scalar Bose-Einstein condensate.

Original languageEnglish
Article number023622
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume86
Issue number2
DOIs
Publication statusPublished - 2012 Aug 20

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Bose-Einstein condensates
domain wall
magnons
excitation
solitary waves
energy
wave excitation
scalars
reflectance
coefficients

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Excitation transport through a domain wall in a Bose-Einstein condensate. / Watabe, Shohei; Kato, Yusuke; Ohashi, Yoji.

In: Physical Review A - Atomic, Molecular, and Optical Physics, Vol. 86, No. 2, 023622, 20.08.2012.

Research output: Contribution to journalArticle

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