Heidelberg 2015 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 15: Poster: Quantum Optics and Photonics I

Q 15.36: Poster

Montag, 23. März 2015, 17:00–19:00, C/Foyer

Universal dynamics and non-thermal fixed points in spinor Bose-Einstein condensates — •Anselm Klenner1,2,3, Markus Karl1,2,3, and Thomas Gasenzer1,2,31Kirchhoff-Institut für Physik, Ruprecht-Karls-Universität Heidelberg, Im Neuenheimer Feld 227, 69120 Heidelberg, Germany — 2Institut für Theoretische Physik, Ruprecht-Karls-Universität Heidelberg, Philosophenweg 16, 69120 Heidelberg, Germany — 3ExtreMe Matter Institute EMMI, GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany

Using numerical simulations we investigate second order phase transitions of spin-1 spinor Bose-Einstein condensates. For the simulations we use the truncated Wigner method which is a statistical approach and uses classical field equations. The spinor condensates provide us with a rich variety of phases and topological defects such as domain walls, spin textures and spin vortices. The types of defects which are created depend on the properties of the critical point. In these simulations we can reach states with quasi-stationary, non-equilibrium momentum distributions, which indicate the vicinity of a non-thermal fixed point. Spinor Bose gases provide ideal means to study such universal critical dynamics far from equilibrium, which is expected to be relevant for a wide range of phenomena far beyond ultracold gases.

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DPG-Physik > DPG-Verhandlungen > 2015 > Heidelberg