Thursday, February 17, 201112:30 PM - 2:00 PMCNLS Conference Room (TA-3, Bldg 1690)|
Solitons as the early stage of quasicondensate formation during evaporative cooling
Mariusz GajdaPolish Academy of Sciences
We calculate the evaporative cooling dynamics of trapped one-dimensional Bose-Einstein condensates for parameters leading to a range of condensates and quasicondensates in the final equilibrium states. We confirm that solitons are created during the evaporation process, but finally dissipate during thermalisation. The distance between solitons at the end of the evaporation ramp matches the coherence length in the final thermal state. Calculations were made using the classical fields method. They bridge the gap between the phase defect picture of the Kibble-Zurek mechanism and the long-wavelength phase fluctuations in the thermal state.
Host: Wojciech Zurek