Hannover 2016 – wissenschaftliches Programm

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A: Fachverband Atomphysik

A 17: Ultracold plasmas and Rydberg systems II (with Q)

A 17.1: Vortrag

Dienstag, 1. März 2016, 14:30–14:45, f303

Dynamically probing ultracold lattice gases via Rydberg molecules — •Oliver Thomas^1,2, Torsten Manthey¹, Thomas Niederprüm¹, Tanita Eichert¹, Philipp Geppert¹, and Herwig Ott¹ — ¹Department of Physics and Research Center OPTIMAS, University of Kaiserslautern, Germany — ²Graduate School Materials Science in Mainz, Gottlieb-Daimler-Strasse 47, 67663 Kaiserslautern, Germany

Rydberg Molecules have been an ongoing field of interest since their first theoretical prediction and experimental realization in ultra cold gases nearly 7 years ago. Since then great progress, theoretically and experimentally, has been made in understanding these exotic states, in which one or more ground state atoms are bound in the electronic wave function of an highly excited Rydberg state by a Fermi contact type interaction.

We show that the excitation of long-range Rydberg molecules can be used to probe position- and time-sensitive the occupation of sites in an ultra-cold many body system, by using the natural decay of the excited molecular state into an ion as a continuous probe. We use this technique to dynamically probe the occupation in a many body quantum system when crossing the superfluid to Mott insulator transition. With the technique of scanning electron microscopy, we also show the position sensitiveness of the used scheme, depleting only atoms located in the inner region of the prepared many body system.