Quantum hydrodynamics with Bose-Einstein condensates: Quantum shocks, counterflow, and novel types of solitons

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• Peter Engels (Washington State University)
• Friday 20 July 2012, 14:00-15:00
• Physics East 217.

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Systems of trapped atoms cooled to ultracold temperatures provide a valuable tool for the exploration of quantum hydrodynamics. In our experiments we investigate the dynamics of single- and two-component dilute-gas Bose-Einstein condensates (BECs) that are confined in a narrow channel. Surprisingly rich dynamics are observed, including dispersive shock waves, modulational instability, and various types of solitons. By exploiting superfluid-superfluid counterflow we can generate trains of dark-bright solitons, as well as beating dark-dark solitons. The latter structures have never before been observed in matter-waves and show interesting dynamics during which they periodically change their structure. The nonlinear behavior of BECs is of wide interest to a number of other fields as well, such as nonlinear optics.

This talk is part of the Cold Atoms series.

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