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arXiv · 1005.2610

Generation of dark-bright soliton trains in superfluid-superfluid counterflow

C. Hamner·J. J. Chang·P. Engels·M. A. Hoefer
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Abstract

The dynamics of two penetrating superfluids exhibit an intriguing variety of nonlinear effects. Using two distinguishable components of a Bose-Einstein condensate, we investigate the counterflow of two superfluids in a narrow channel. We present the first experimental observation of trains of dark-bright solitons generated by the counterflow. Our observations are theoretically interpreted by three-dimensional numerical simulations for the coupled Gross-Pitaevskii (GP) equations and the analysis of a jump in the two relatively flowing components' densities. Counterflow induced modulational instability for this miscible system is identified as the central process in the dynamics.

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C. Hamner, J. J. Chang, P. Engels, M. A. Hoefer. 2010-05-14. Generation of dark-bright soliton trains in superfluid-superfluid counterflow. https://doi.org/10.1103/physrevlett.106.065302

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