Dark-dark solitons and modulational instability in miscible, two-component Bose-Einstein condensates
Quantum Gases
2011-11-10 v2 Pattern Formation and Solitons
Abstract
We investigate the dynamics of two miscible superfluids experiencing fast counterflow in a narrow channel. The superfluids are formed by two distinguishable components of a trapped dilute-gas Bose-Einstein condensate (BEC). The onset of counterflow-induced modulational instability throughout the cloud is observed and shown to lead to the proliferation of dark-dark vector solitons. These solitons, which we observe for the first time in a BEC, do not exist in single-component systems, exhibit intriguing beating dynamics and can experience a transverse instability leading to vortex line structures. Experimental results and multi-dimensional numerical simulations are presented.
Cite
@article{arxiv.1007.4947,
title = {Dark-dark solitons and modulational instability in miscible, two-component Bose-Einstein condensates},
author = {M. A. Hoefer and J. J. Chang and C. Hamner and P. Engels},
journal= {arXiv preprint arXiv:1007.4947},
year = {2011}
}
Comments
7 pages, 7 figures, significant rewrite of the original