Erlangen 2018 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 17: Bose-Einstein Condensation (joint session A/Q)

Q 17.6: Vortrag

Montag, 5. März 2018, 15:15–15:30, K 2.016

Phase separation dynamics in a many-body Binary Bose-Einstein condensate — •Simeon Mistakidis¹, Garyfallia Katsimiga¹, Panagiotis Kevrekidis², and Peter Schmelcher^1,3 — ¹Zentrum für optische Quantentechnologien Luruper Chaussee 149 22761 Hamburg — ²Department of Mathematics and Statistics, University of Massachusetts Amherst, Amherst, MA 01003-4515, USA — ³The Hamburg Centre for Ultrafast Imaging, Universitat Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany

The many-body quenched dynamics of a binary mixture crossing the miscibility-immiscibility boundary and vice versa, is examine. Increasing the interspecies repulsion leads to the filamentation of the density of each component, involving shorter wavenumbers (and longer spatial scales) in the many-body approach. These filaments appear to be strongly correlated both at the one- and the two-body level, exhibiting domain-wall structures. Furthermore, following the reverse quench process dark-bright soliton trains are spontaneously generated and subsequently found to decay in the many-body scenario. We utilize single-shot images to provide a clean experimental realization of our current findings via which the filamentation process is clearly captured. To expose further the many-body nature of the observed dynamics direct measurements of the variance of single-shots are performed, verifying the presence of fragmentation but also the entanglement between the species.