Pattern formation in a driven Bose-Einstein Condensate
arXiv:1909.05536 · doi:10.1038/s41567-020-0839-3
Abstract
Pattern formation is ubiquitous in nature from morphogenesis and cloud formation to galaxy filamentation. More often than not, patterns arise in a medium driven far from equilibrium due to the interplay of dynamical instability and nonlinear wave mixing. We report, based on momentum and real space pattern recognition, formation of density patterns with two- (D), four- (D) and six-fold (D) symmetries in Bose-Einstein condensates (BECs) with atomic interactions driven at two frequencies. The symmetry of the pattern is controlled by the ratio of the frequencies. The D density waves, in particular, arise from a resonant wave mixing process that coherently correlates and enhances the excitations that respect the symmetry.
arXiv commentMain text: 6 pages, 4 figures; Supplement: 10 pages, 5 figures
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