Special Condensed Matter Seminar | Johannes Zeiher, Max Planck | "Microscopy of Rydberg-dressed quantum gases" | PCTS Seminar Room 407

Mon, May 21, 2018, 1:15 pm


Off-resonant optical coupling of an atomic ground state to a Rydberg state, so-called "Rydberg-dressing", has been proposed as a versatile method to implement various long-range interacting spin models with ultracold atoms.

In our experiment, we realize Rydberg-dressed Ising spin interactions in an atomic Mott insulator of Rubidium-87 by off-resonant optical coupling to Rydberg p-states.

First interferometric experiments in a two-dimensional sample demonstrated versatile control of these interactions, however collective loss processes reduced the lifetime of the system.

Recent experimental results for a Rydberg-dressed one-dimensional Ising chain with long-range interactions showed that, contrary to the 2d case, the collective loss can be avoided.

We substantiated the resulting improvement of lifetimes by detecting interaction-driven coherent collapse and revival dynamics of the magnetization in the chain.

Finally, I will present our experimental progress on working with more exotic Rydberg interaction potentials, which promise further improvement of coherence times as well as access to entirely novel interaction characteristics.

PCTS Seminar Room 407