Attraction-induced dynamical stability of a Bose-Einstein condensate in a nonlinear lattice
Quantum Gases
2016-07-07 v2 Superconductivity
Pattern Formation and Solitons
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.
Keywords
Cite
@article{arxiv.1603.07486,
title = {Attraction-induced dynamical stability of a Bose-Einstein condensate in a nonlinear lattice},
author = {Raka Dasgupta and B. Prasanna Venkatesh and Gentaro Watanabe},
journal= {arXiv preprint arXiv:1603.07486},
year = {2016}
}
Comments
11 pages, 14 figures