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Q: Fachverband Quantenoptik und Photonik

Q 21: Poster I

Q 21.2: Poster

Dienstag, 9. März 2010, 16:00–19:00, Lichthof

Matter Wave Turbulence — •Boris Nowak, Christian Scheppach, and Thomas Gasenzer — Institut für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg

Turbulence phenomena are studied in an ultracold Bose gas away from thermal equilibrium analytically and numerically. In the framework of functional quantum field theory turbulence fixed points of the dynamical evolution can be characterized analytically in terms of universal scaling exponents of correlation functions. It is shown that certain scaling exponents derived within the Kolmogorov theory of wave turbulence are not necessary found in the full dynamical theory considered here. Our results indicate, however, that the Kolmogorov picture remains useful even in the strong turbulence regime at long wavelengths. To explore possibilities for accessing this strong turbulence regime at low momenta in experiments with ultracold atomic gases, we study the dynamics numerically by means of c-field methods.