Freiburg 2024 – scientific programme

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Q: Fachverband Quantenoptik und Photonik

Q 18: Trapping and Cooling of Atoms (joint session Q/A)

Q 18.4: Talk

Tuesday, March 12, 2024, 12:00–12:15, HS 1221

Towards light scattering experiments in dense dipolar gases — •Ishan Varma, Marvin Proske, Rhutwik Sriranga, and Patrick Windpassinger — Institute of Physics, JGU Mainz

Dysprosium is a fascinating candidate for studying cooperative and collective effects in dense ultra-cold media. With the largest ground state magnetic moment of all elements in the periodic table (10 Bohrmagnetons), it offers a platform to study light scattering in a system where magnetic dipole-dipole interactions (DDI) and light induced correlations are in mutual competition. At sufficiently high atomic densities, the strong magnetic DDI significantly influence the propagation of light within the sample. In particular, we want to look at signatures of collective light scattering phenomena like super- and subradiance.

This talk reports on the progress made in generating dense samples of ultracold dysprosium atoms. We plan to optically transport atoms into a home-built science cell with high optical access. The creation and imaging of dense atomic samples inside the science cell is achieved using high NA custom objectives, designed and assembled in-house. We present the performance characterization and discuss the development of these objectives in our experimental system. Further, an outlook is given on future measurements exploring collective and cooperative effects in the generated sample.

Keywords: dipolar gases; quantum cooperativity; custom optics design; superradiance and subradiance