Hannover 2016 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 29: Quantum Gases: Bosons III

Q 29.5: Vortrag

Mittwoch, 2. März 2016, 12:15–12:30, e001

Formation of Jones-Roberts solitons in a flat Bose-Einstein condensate — •Nadine Meyer, Harry Proud, Jixun Liu, Charlotte O’Neale, Marisa Perea-Ortiz, Giovanni Barontini, and Kai Bongs — School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B152TT, United Kingdom

Nonlinear systems out of equilibrium give rise to vortex and soliton solutions that play an important role in high speed optical communication, energy transport mechanisms in molecular biology and astrophysics. Collective excitations are of special interest in this respect. However, plane solitons in 2D are intrinsically dynamical unstable, leaving the open question of reliable transport mechanism on surfaces in nature. The so-called Roberts solitons predicted in 1982 are part of the rich family of formstable soliton solutions with enhanced dynamical stability aspects regarding transport. In order to gain a deeper insight into these phenomena well controlled and flexible many body quantum systems at finite temperatures can be used for the simulation of these fundamental collective excitations of the nonlinear Gross-Pitaevski equation (GPE) and their dynamics. Here we employ phase imprinting methods for the first generation of these Jones Roberts solitons in ultracold gases of ⁸⁷Rb. By tailoring the optical imprint of a spatial light modulator (SLM), the quantum phase of the Bose-Einstein condensate can be arbitrarily engineered . The evolution and dynamics of Jones Roberts solitons prove them as long lived stable excitations travelling on extended surfaces.