Bereiche | Tage | Auswahl | Suche | Downloads | Hilfe
Q: Fachverband Quantenoptik und Photonik
Q 40: Quantengase (Spinor-Gase)
Q 40.1: Vortrag
Mittwoch, 21. März 2007, 14:00–14:15, 6J
Vortex quantum creation and winding number scaling in a quenched spinor Bose gas — Michael Uhlmann1, Ralf Schützhold1, and •Uwe R. Fischer2 — 1Institut für Theoretische Physik, Technische Universität Dresden, D-01062 Dresden, Germany — 2Eberhard-Karls-Universität Tübingen, Institut für Theoretische Physik, Auf der Morgenstelle 14, D-72076 Tübingen, Germany
Motivated by a recent experiment, we study non-equilibrium quantum phenomena taking place in the quench of a spinor Bose gas through the zero-temperature phase transition separating the polar paramagnetic phase and the ferromagnetic phase. We derive the typical domain structure created by the quench arising due to spin-mode fluctuations, and establish a sample-size scaling law for the creation of spin vortices, which are topological defects in the transverse magnetization.