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Q: Fachverband Quantenoptik und Photonik

Q 22: Ultracold Matter (Bosons) II (joint session Q/A)

Q 22.8: Vortrag

Dienstag, 11. März 2025, 12:45–13:00, HS I PI

Deterministic Generation of Topological Spin Excitations in a Bose-Einstein Condensate — •Yannick Deller, Alexander Schmutz, Raphael Schäfer, Alexander Flamm, Helmut Strobel, and Markus K. Oberthaler — Kirchhoff-Institut für Physik, Universität Heidelberg, Deutschland

Spinor BEC experiments are an ideal platform for quantum field simulations far from equilibrium with exquisite control over the initial state as well as the readout. The spin-1 system supports a wealth of localized nonlinear excitations, classified by the spatial structure of the spin observables and the atomic densities [1,2,3].
We report on the deterministic generation of topological spin excitations by utilizing a spatially controlled spinor phase imprinting scheme in a quasi one-dimensional ferromagnetic spin-1 BEC. We track their time evolution in all relevant observables by employing a generalized POVM readout scheme [4] and study key properties like propagation speed and lifetime.
1 Lannig et. al., PRL 125, 170401 (2020)
2 Chai et. al., PRL 125, 030402 (2020)
3 Yu and Blakie, PRL 128, 125301 (2022)
4 Kunkel et. al., PRL 123, 063603 (2019)

Keywords: Spin excitations; Spinor Bose Einstein Condensate; Topological; Quantum Field Simulation; ferromagnetic