Stuttgart 2012 – wissenschaftliches Programm
Q 34.11: Poster
Dienstag, 13. März 2012, 16:30–19:00, Poster.I+II
Quantum turbulence in an ultracold Bose gas — •Boris Nowak1,2, Maximilian Schmidt1,2, Jan Schole1,2, Denes Sexty1,2, and Thomas Gasenzer1,2 — 1Institut für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg — 2ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany
Turbulence in an ultracold Bose gas, in one, two and three spatial dimensions, is investigated analytically and numerically. A special focus is set on the infrared regime of large-scale excitations following universal power-law distributions distinctly different from those of commonly known weak wave-turbulence phenomena. It is explained, how the infrared power laws can be understood from the statistics of vortices as well as from an analytic field-theoretic approach based on the 2PI effective action. Possible ways to experimentally study strong turbulence phenomena with ultracold atomic gases are outlined.