Erlangen 2022 – scientific programme

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A: Fachverband Atomphysik

A 29: Ultra-cold atoms, ions and BEC (joint session A/Q)

A 29.14: Poster

Thursday, March 17, 2022, 16:30–18:30, P

Magnetic-field-coils and 3D-MOT for novel dysprosium quantum gas experiment — •Joschka Schöner, Lennart Hoenen, Jianshun Gao, Christian Gölzhäuser, Karthik Chandrashekara, Valentina Salazar Silva, Shuwei Jin, and Lauriane Chomaz — Physikalisches Institut, Heidelberg, Germany

Ultra-cold atoms are one of the major platforms to study novel quantum phenomena due to their outstanding level of controllability. Highly magnetic atoms like Dysprosium show a long-range, anisotropic dipolar interaction, comparable in strength to the short-range contact interaction. These interactions can be precisely tuned by controlling the direction and strength of the applied magnetic fields.

At our new Quantum Fluids group in Heidelberg we aim to produce ultracold quantum gases of Dy to study exotic physical phenomena like supersolidity, topological ordering, and out-of-equilibrium physics emerging from competing dipolar and contact interactions and restricting the system to 2D. Our novel experimental platform relies on transferring Dy atoms from a 2D- to a 3D-MOT before loading them into an accordion lattice combined with an in-plane trap of tailorable geometry and a highly controllable magnetic-field environment.

I will report on our 3D-MOT and coil setup. The latter is made of 5 pairs of coils used to generate (1) gradient fields for the MOT, (2) homogeneous magnetic fields at the required strengths and orientations with fast response times. This is central to our quest to realize the promise of the outstanding level of controllability of the ultra-cold atom platform to investigate novel quantum phenomena.