Freiburg 2024 – scientific programme

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A: Fachverband Atomphysik

A 25: Poster IV

A 25.8: Poster

Wednesday, March 13, 2024, 17:00–19:00, Tent A

Topological pumping of vortices through Bloch-like oscillations of a magnetic soliton — Franco Rabec, Guillaume Chauveau, •Guillaume Brochier, Sylvain Nascimbene, Jean Dalibard, and Jérôme Beugnon — Laboratoire Kastler Brossel, Collège de France, France

Bloch oscillations are a striking feature of the counterintuitive motion of particles created by a lattice potential. However, one can reproduce such an effect with a system that is translationally invariant, provided that the dispersion relation remains periodic. An example is realized by a magnetic soliton which can be mapped onto an immiscible spin mixture in a quasi-1D Bose gas. We report on the observation of such Bloch-like oscillations. We experimentally investigate this phenomenon with both strict boundary conditions and periodic boundary conditions, the latter revealing the presence of a backflow and the formation of a topological vortex pump in this system.

Keywords: Bloch-like oscillations; Quasi-1D; Magnetic soliton; Vortex pump; Backflow