Hannover 2020 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 54: Posters: Quantum Optics and Photonics IV
Q 54.35: Poster
Thursday, March 12, 2020, 16:30–18:30, Empore Lichthof
Stabilization of a dark soliton by localised dissipation — •Alexandre Gil Moreno1, Christian Baals1,2, Jens Benary1, Marvin Röhrle1, Jian Jiang1, and Herwig Ott1 — 1Department of Physics and Research Center OPTIMAS, Technische Universität Kaiserslautern, Germany — 2Graduate School Materials Science in Mainz, Germany
We numerically study the stability of a dark soliton in a 3D system using the Gross-Pitaevskii equation with an imaginary potential. Our starting point is the ground state of a Bose-Einstein condensate in an elongated harmonic trap with a dark soliton. This initial state decays due to the sneaking instability, which means that the dark soliton eventually turns into a vortex ring. By applying local losses (i.e. a local imaginary potential) at the centre, we observe a slow down of the decay with increasing imaginary potential. Above a critical dissipation strength, the soliton becomes stabilised (within our computational time).