Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 24: Poster II
Q 24.36: Poster
Dienstag, 12. März 2024, 17:00–19:00, KG I Foyer
Prospects for experiments with ultracold atoms in a five-fold symmetric quasicrystal optical lattice with tunable geometrie — •Jonathan Bracker1, Luca Asteria1,2, Marcel Nathanael Kosch1, Klaus Sengstock1,2,3, and Christof Weitenberg1,2 — 1Institut für Quantenphysik, Universität Hamburg, 22761 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, 22761 Hamburg, Germany — 3Zentrum für Optische Quantentechnologien, Universität Hamburg, 22761 Hamburg, Germany
Quasicrystal lattices constitute a fascinating middleground between periodic lattices and disordered systems with intricate topological properties and exotic many-body phases. They can be considered as a projection from a higher dimensional space, from which they inherit their topology. First experiments with ultracold atoms in quasi-periodic lattices have been realized in recent years, but so far, the higher dimensional space had a trivial geometry. Here we present a way to realize a quasicrystal lattice with a non-trivial underlying
geometry. This setup is characterized by a five-fold rotational symmetry and we discuss how it will be realized via a multi-frequency scheme with full dynamical control over the geometric degree of freedom [1]. We also present numerical results on the expected transport and
localization properties as a function of this geometric degree of
freedom.
[1] M. Kosch et al., Phys. Rev. Research 4, 043083 (2022)
Keywords: optical lattice; cold atoms; quasicrystal; topology; tunable lattice