Rostock 2019 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 12: Ultra-cold atoms, ions and BEC

A 12.27: Poster

Dienstag, 12. März 2019, 16:30–18:30, S Fobau Physik

Two-compnent spinor Bose-Einstein condensate coupled with twisted light — •Yuriy Bidasyuk — Physikalisch Technische Bundesanstalt, Braunschweig, Germany

Twisted light beams and their interactions with matter atract considerable attention within last years. In the present work we investigate the interaction of twisted light with atomic Bose-Einstein condensates (BEC). To this end we analyze the stationary states of the two-component spinor BEC with coherent coupling by the twisted light beam. Such Rabi coupling has a nontrivial spatial dependence of both amplitude and phase. We develop a simplified analytical model for a ring-shaped BEC and compare it's predictions with a full numerical calculations based on the system of coupled Gross-Pitaevskii equations. Performing a comprehensive study of a ground-state phase portrait of the system we reveal several distinct phases and characterize corresponding phase transitions.