Mainz 2017 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 38: Quantum Gases: Bosons V

Q 38.6: Vortrag

Mittwoch, 8. März 2017, 15:45–16:00, P 204

Observation of scaling in the coarsening dynamics of a quenched one-dimensional spinor Bose-Einstein condensate — •Maximilian Prüfer, Christian-Marcel Schmied, Philipp Kunkel, Daniel Linnemann, Anika Frölian, Helmut Strobel, Thomas Gasenzer, and Markus K. Oberthaler — Kirchhoff-Institut für Physik, Im Neuenheimer Feld 227, 69120 Heidelberg

Coarsening dynamics features a scaling behaviour of the characteristic length scale as a function of time. Accessing experimentally the corresponding scaling exponent, we employ a Bose-Einstein condensate of ⁸⁷Rb in the F = 1 hyperfine manifold with ferromagnetic interaction. We prepare the system in the polar phase and quench it into the symmetry broken ferromagnetic phase. After a build-up of excitations in the transversal spin, as predicted by Bogoliubov theory, we observe a self-similar coarsening evolution with a characteristic power-law behaviour for long evolution times. By rescaling the spatial correlation functions we determine the scaling exponent z describing the temporal evolution of the characteristic length scale.