Freiburg 2024 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 24: Poster II
Q 24.9: Poster
Dienstag, 12. März 2024, 17:00–19:00, KG I Foyer
A new dysprosium quantum gas experiment — •Lucas Lavoine1, Jens Hertkorn1, Paul Uerlings1, Kevin Ng1, Fiona Hellstern1, Tim Langen1,2, Ralf Klemt1, and Tilman Pfau1 — 15. Physikalisches Institut, Universität Stuttgart — 2Atominstitut, TU Wien
Dysprosium offers the possibility to study degenerate quantum gases with anisotropic and long-range dipolar interactions competing with contact interactions. Tuning the relative interaction strength has led to the observation of new many-body states, including droplets and supersolids. While most of the experiment have been done in one-dimensional traps, recent theoretical works predict an exotic phase diagram in two-dimensional traps (2D), including honeycomb, labyrinthine, supersolid phases. The labyrinthine patterns are characterized by amorphous spatial structures consisting of elongated and bent density stripes and support superfluid flows along the stripes. We have recently built up a new dysprosium machine. With our new setup, we produce large Bose-Einstein condensates (BEC) with faster cycle times. By means of a high-NA (0.5) objective and a phase-contrast imaging technique, we are able to resolve spatial structures of about 0.5 micrometers. We plan to load the BEC in tailored potentials made by a digital micro-mirror device (DMD) with the aim to explore both the phase diagram of a 2D dipolar quantum gas and study the superfluid properties of the supersolid states by means of persistent currents in rotating ring-shaped potentials. On this poster we present the new experimental setup and report our recent experimental achievements.
Keywords: Dipolar quantum gas; Supersolid