Dresden 2011 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 2: Quantum Gases: Bosons 1
Q 2.8: Vortrag
Montag, 14. März 2011, 12:15–12:30, HÜL 386
Scaling laws of turbulent ultracold bosons — •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
Turbulent dynamics in an ultracold Bose gas, in two and three spatial dimensions, is analysed by means of statistical simulations using the classical field equation. 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. The infrared power laws which have been predicted within an analytic field-theoretic approach based on the 2PI effective action, are discussed in comparison to the well-known Kolmogorov scaling of vortical motion. These phenomena of strong turbulence should in principle be observable with ultracold atomic gases.