Attraction-induced dynamical stability of a Bose-Einstein condensate in a nonlinear lattice
arXiv:1603.07486 · doi:10.1103/PhysRevA.93.063618
Abstract
We study multiple-period Bloch states of a Bose-Einstein condensate with spatially periodic interactomic interaction. Solving the Gross-Pitaevskii equation for the continuum model, and also using a simplified discrete version of it, we investigate the energy-band structures and the corresponding stability properties. We observe a new "attraction-induced dynamical stability" mechanism caused by the localization of the density distribution in the attractive domains of the system and the isolation of these higher-density regions. This makes the superfluid stable near the zone boundary, and also enhances the stability of higher-periodic states if the nonlinear interaction strength is sufficiently high.
arXiv comment11 pages, 14 figures
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Cited by in corpus (5)
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- Superfluidity breakdown of Rabi-coupled two-component Bose-Einstein condensates in optical lattices
- Instabilities of a Bose-Einstein condensate with mixed nonlinear and linear lattices
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