Hannover 2010 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 3: Quantum Gases: Bosons I

Q 3.1: Talk

Monday, March 8, 2010, 14:00–14:15, E 001

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

Turbulent scaling phenomena in an ultracold Bose gas far away from thermal equilibrium are studied theoretically. These phenomena are characterized in terms of universal scaling of correlation functions like the momentum distribution of particles. It is shown that certain scaling exponents derived within the Kolmogorov-Zakharov theory of wave turbulence are not necessarily found in the full dynamical theory considered here. Despite this, our results indicate that the Kolmogorov picture remains useful even in the strong turbulence regime at long wavelengths. Power-laws with anomalously large exponents recently found for the momentum dependence of the density in the long-wavelength limit could be experimentally accessible in ultracold atomic gases. Possible avenues to study such dynamical critical phenomena in experiments with ultracold gases are explored.