Observation of a Modulational Instability in Bose-Einstein condensates
Quantum Gases
2017-10-11 v2 Atomic Physics
Abstract
We observe the breakup dynamics of an elongated cloud of condensed Rb atoms placed in an optical waveguide. The number of localized spatial components observed in the breakup is compared with the number of solitons predicted by a plane-wave stability analysis of the nonpolynomial nonlinear Schr\"odinger equation, an effective one-dimensional approximation of the Gross-Pitaevskii equation for cigar-shaped condensates. It is shown that the numbers predicted from the fastest growing sidebands are consistent with the experimental data, suggesting that modulational instability is the key underlying physical mechanism driving the breakup.
Keywords
Cite
@article{arxiv.1703.07502,
title = {Observation of a Modulational Instability in Bose-Einstein condensates},
author = {P. J. Everitt and M. A. Sooriyabandara and M. Guasoni and P. B. Wigley and C. H. Wei and G. D. McDonald and K. S. Hardman and P. Manju and J. D. Close and C. C. N. Kuhn and S. S. Szigeti and Y. S. Kivshar and N. P. Robins},
journal= {arXiv preprint arXiv:1703.07502},
year = {2017}
}
Comments
6 pages, 5 figures