Excitation Transport through a Domain Wall in a Bose-Einstein Condensate
arXiv:1208.0381 · doi:10.1103/PhysRevA.86.023622
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 non-monotonicity. 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.
10 pages, 7 figures
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Cited by in corpus (5)
- Nambu-Goldstone modes in segregated Bose-Einstein condensates
- Spin-Current Instability at a Magnetic Domain Wall in a Ferromagnetic Superfluid: a Generation Mechanism of Eccentric Fractional Skyrmions
- The nonlinear Dirac equation in Bose-Einstein condensates: II. Relativistic soliton stability analysis
- Precise wavefunction engineering with magnetic resonance
- Perfect transmission and perfect reflection of Bogoliubov quasiparticles in a dynamically unstable Bose-Einstein condensate