Physics – Condensed Matter – Quantum Gases
Scientific paper
2010-05-14
Phys. Rev. Lett. 106, 065302 (2011)
Physics
Condensed Matter
Quantum Gases
5 pages, 4 figures
Scientific paper
10.1103/PhysRevLett.106.065302
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.
Chang Jaewan
Engels P.
Hamner C.
Hoefer Mark A.
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