Bonn 2025 – wissenschaftliches Programm

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Q: Fachverband Quantenoptik und Photonik

Q 25: Poster – Cold Atoms and Molecules, Matter Waves (joint session Q/A/MO)

Q 25.12: Poster

Dienstag, 11. März 2025, 14:00–16:00, Tent

Studying Dipolar Supersolids in Toroidal Geometries using DMDs — •Tanishi Verma¹, Paul Uerlings¹, Fiona Hellstern¹, Kevin Ng¹, Alexandra Köpf¹, Michael Wischert¹, Stephan Welte^1,2, Ralf Klemt¹, and Tilman Pfau¹ — ¹5. Physikalisches Institut, Universität Stuttgart, Pfaffenwaldring 57, 70569 Stuttgart, Germany — ²Center for Integrated Quantum Science and Technology and CZS Center QPhoton, Pfaffenwaldring 57, 70569 Stuttgart, Germany

Supersolids are characterised by a combination of the crystal structure of solids and the frictionless flow of superfluids, and can be realised experimentally through the self-organisation of long-range interacting trapped BECs into states of matter that resemble crystal like structures. In a recent work, dipolar supersolids in toroidal traps have been studied theoretically. Toroidal traps provide continuous rotational symmetry and periodic boundary conditions, which can be used to study the different amplitude and sound modes which emerge during the superfluid to supersolid phase transition, especially the Higgs amplitude mode, which has yet to be experimentally observed.

We plan to load the BEC produced in our new-generation Dysprosium machine in a toroidal trap made with a Digital Micromirror Device (DMD), and also implement a lightsheet using a 532nm laser for z-direction confinement. This poster presents our progress on the optical setup in order to create toroidal traps to study toroidal dipolar supersolids and their excitation modes.

Keywords: Dipolar Quantum Gases; Supersolids; Bose Einstein Condensates